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An abalone diver is normally equipped with a thick wetsuit, including a hood, bootees, and gloves, and usually also a mask, snorkel, weight belt, abalone iron, and abalone gauge. Alternatively, the rock picker can feel underneath rocks at low tides for abalone. Abalone are mostly taken in depths from a few inches up to ; less common are freedivers who can work deeper than . Abalone are normally found on rocks near food sources such as kelp. An abalone iron is used to pry the abalone from the rock before it has time to fully clamp down. Divers dive from boats, kayaks, tube floats, or directly off the shore.
The largest abalone recorded in California is , caught by John Pepper somewhere off the coast of San Mateo County in September 1993.
The mollusc "Concholepas concholepas" is often sold in the United States under the name "Chilean abalone", though it is not an abalone, but a muricid.
New Zealand.
In New Zealand, abalone is called "pāua" (, from the Māori language). "Haliotis iris" (or blackfoot pāua) is the ubiquitous New Zealand pāua, the highly polished nacre of which is extremely popular as souvenirs with its striking blue, green, and purple iridescence. "Haliotis australis" and "Haliotis virginea" are also found in New Zealand waters, but are less popular than "H. iris". "Haliotis pirimoana" is a small species endemic to Manawatāwhi / the Three Kings Islands that superficially resembles "H. virginea".
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Like all New Zealand shellfish, recreational harvesting of "pāua" does not require a permit provided catch limits, size restrictions, and seasonal and local restrictions set by the Ministry for Primary Industries (MPI) are followed. The legal recreational daily limit is 10 per diver, with a minimum shell length of for "H. iris" and for "H. australis". In addition, no person may be in possession, even on land, of more than 20 pāua or more than of pāua meat at any one time. Pāua can only be caught by free-diving; it is illegal to catch them using scuba gear.
An extensive global black market exists in collecting and exporting abalone meat. This can be a particularly awkward problem where the right to harvest pāua can be granted legally under Māori customary rights. When such permits to harvest are abused, it is frequently difficult to police. The limit is strictly enforced by roving Ministry for Primary Industries fishery officers with the backing of the New Zealand Police. Poaching is a major industry in New Zealand with many thousands being taken illegally, often undersized. Convictions have resulted in seizure of diving gear, boats, and motor vehicles and fines and in rare cases, imprisonment.
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South Africa.
There are five species endemic to South Africa, namely "H. parva", "H. spadicea", "H. queketti" and "H. speciosa".
The largest abalone in South Africa, "Haliotis midae", occurs along roughly two-thirds of the country's coastline. Abalone-diving has been a recreational activity for many years, but stocks are currently being threatened by illegal commercial harvesting. In South Africa, all persons harvesting this shellfish need permits that are issued annually, and no abalone may be harvested using scuba gear.
For the last few years, however, no permits have been issued for collecting abalone, but commercial harvesting still continues as does illegal collection by syndicates.
In 2007, because of widespread poaching of abalone, the South African government listed abalone as an endangered species according to the CITES section III appendix, which requests member governments to monitor the trade in this species. This listing was removed from CITES in June 2010 by the South African government and South African abalone is no longer subject to CITES trade controls. Export permits are still required, however.
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The abalone meat from South Africa is prohibited for sale in the country to help reduce poaching; however, much of the illegally harvested meat is sold in Asian countries. As of early 2008, the wholesale price for abalone meat was approximately US$40.00 per kilogram. There is an active trade in the shells, which sell for more than US$1,400 per tonne.
Channel Islands, Brittany and Normandy.
Ormers ("Haliotis tuberculata") are considered a delicacy in the British Channel Islands as well as in adjacent areas of France, and are pursued with great alacrity by the locals. This, and a recent lethal bacterial disease, has led to a dramatic depletion in numbers since the latter half of the 19th century, and "ormering" is now strictly regulated to preserve stocks. The gathering of ormers is now restricted to a number of 'ormering tides', from 1 January to 30 April, which occur on the full or new moon and two days following. No ormers may be taken from the beach that are under in shell length. Gatherers are not allowed to wear wetsuits or even put their heads underwater. Any breach of these laws is a criminal offence and can lead to a fine of up to £5,000 or six months in prison. The demand for ormers is such that they led to the world's first underwater arrest, when Mr. Kempthorne-Leigh of Guernsey was arrested by a police officer in full diving gear when illegally diving for ormers.
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Decorative items.
The highly iridescent inner nacre layer of the shell of abalone has traditionally been used as a decorative item, in jewelry, buttons, and as inlay in furniture and musical instruments, such as on fret boards and binding of guitars. See article Najeonchilgi regarding Korean handicraft.
Indigenous use.
Abalone has been an important staple in a number of Indigenous cultures around the world, specifically in Africa and on the Northwest American coast. The meat is a traditional food, and the shell is used to make ornaments; historically, the shells were also used as currency in some communities.
Threat of extinction.
Abalone are critically threatened due to overfishing and the acidification of oceans as lower pH erodes the calcium carbonate in their shells. In the 21st century, white, pink, and green abalone are on the United States federal endangered species list. Possible restoration sites have been proposed for the San Clemente Island and Santa Barbara Island areas. Reintroduction of farming abalone to the wild has been proposed, with these abalone having special tags to help track the population.
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Species.
The number of species that are recognized within the genus "Haliotis" has fluctuated over time, and depends on the source that is consulted. The number of recognized species range from 30 to 130. This list finds a compromise using the WoRMS database, plus some species that have been added, for a total of 57. The majority of abalone have not been rated for conservation status. Those that have been reviewed tend to show that the abalone in general is an animal that is declining in numbers, and will need protection throughout the globe.
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Abbess
An abbess (Latin: "abbatissa") is the female superior of a community of nuns in an abbey.
Description.
In the Catholic Church (both the Latin Church and Eastern Catholic), Eastern Orthodox, Coptic and Anglican abbeys, the mode of election, position, rights, and authority of an abbess correspond generally with those of an abbot. She must be at least 40 years old and have been a nun for 10 years. The age requirement in the Catholic Church has evolved over time, ranging from 30 to 60. The requirement of 10 years as a nun is only eight in Catholicism. In the rare case of there not being a nun with the qualifications, the requirements may be lowered to 30 years of age and five of those in an "upright manner", as determined by the superior. A woman who is of illegitimate birth, is not a virgin, has undergone non-salutory public penance, is a widow, or is blind or deaf, is typically disqualified for the position, saving by permission of the Holy See. The office is elective, the choice being by the secret votes of the nuns belonging to the community. Like an abbot, after being confirmed in her office by the Holy See, an abbess is solemnly admitted to her office by a formal blessing, conferred by the bishop in whose territory the monastery is located, or by an abbot or another bishop with appropriate permission. Unlike the abbot, the abbess receives only the ring, the crosier, and a copy of the rule of the order. She does not receive a mitre as part of the ceremony. The abbess also traditionally adds a pectoral cross to the outside of her habit as a symbol of office, though she continues to wear a modified form of her religious habit or dress, as she is unordained—females cannot be ordained—and so does not vest or use choir dress in the liturgy. An abbess serves for life, except in Italy and some adjacent islands.
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Roles and responsibilities.
Abbesses are, like abbots, major superiors according to canon law, the equivalents of abbots or bishops (the ordained male members of the church hierarchy who have, by right of their own office, executive jurisdiction over a building, diocesan territory, or a communal or non-communal group of persons—juridical entities under church law). They receive the vows of the nuns of the abbey; they may admit candidates to their order's novitiate; they may send them to study; and they may send them to do pastoral or missionary, or to work or assist—to the extent allowed by canon and civil law—in the administration and ministry of a parish or diocese (these activities could be inside or outside the community's territory). They have full authority in its administration.
However, there are significant limitations.
There are exigent circumstances, where due to Apostolical privilege, certain Abbesses have been granted rights and responsibilities above the normal, such as the Abbess of the Cistercian Monastery of the Abbey of Santa María la Real de Las Huelgas near Burgos, Spain. Also granted exceptional rights was the Abbess of the Cistercian order in Conversano Italy. She was granted the ability to appoint her own vicar-general, select and approve the confessors, along with the practice of receiving the public homage of her clergy. This practice continued until some of the duties were modified due to an appeal by the clergy to Rome. Finally in 1750, the public homage was abolished.
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During the Middle Ages (7th–10th centuries) in the Catholic Church, greater restrictions on abbesses' spiritual independence gained pace. Instruments of church authority, from papal bulls down to local sanctions, were increasingly used to restrict their freedom to dispense blessings, administer sacraments, including the veiling of nuns, and publicly read the gospels or preach. Such spiritual—and even temporal—authority had in earlier church history, largely been unremarkable. As Thomas Oestereich, contributor to the "Catholic Encyclopedia" (1913), makes clear, abbesses' past spiritual authority was increasingly seen as the "usurpation" of corresponding priestly power, and a solely male privilege. He gives an example of the attitude toward such practice, from the 9th century, which persists in church administrative control into the modern era:
Similarly, in 1210, Innocent III (died 1216) expressed his view of the Cistercian Abbesses of Burgos and Palencia in Spain, who preached and heard confessions of their own religious, characterizing these acts as "unheard of, most indecorous, and highly preposterous."
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History.
Historically, in some Celtic monasteries, abbesses presided over joint-houses of monks and nuns, the most famous example being Saint Brigid of Kildare's leadership in the founding of the monastery at Kildare in Ireland. This custom accompanied Celtic monastic missions to France, Spain, and even to Rome itself. In 1115, Robert, the founder of Fontevraud Abbey near Chinon and Saumur, France, committed the government of the whole order, men as well as women, to a female superior.
In Lutheran churches, the title of abbess () has in some cases survived (for example, in the ) to designate the heads of abbeys which since the Protestant Reformation have continued as monasteries or convents (). These positions continued, merely changing from Catholic to Lutheran. The first to make this change was the Abbey of Quedlinburg, whose last Catholic Abbess died in 1514. These are collegiate foundations, which provide a home and an income for unmarried ladies, generally of noble birth, called canonesses (), or more usually, or . The office of abbess is of considerable social dignity, and in the past, was sometimes filled by princesses of the reigning houses. Until the dissolution of Holy Roman Empire and mediatisation of smaller imperial fiefs by Napoleon, the evangelical Abbess of Quedlinburg was also per officio the head of that state. The last such ruling abbess was Sofia Albertina, Princess of Sweden. The abess Hildegard of Fraunmünster Abbey sat in the Imperial Diet among other princes of the Holy Roman Empire. The oldest women's abbey in Germany is St. Marienthal Abbey of Cistercian nuns, near Ostritz, established during the early 13th century.
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In the Hradčany of Prague is a Catholic institute whose mistress is titled an Abbess. It was founded in 1755 by the Empress Maria Theresa, and traditionally was responsible for the coronation of the Queen of Bohemia. The Abbess is required to be an Austrian Archduchess.
it was estimated the Catholic Church had around 200 presiding abbesses.
Abbas placename.
The word 'Abbas' is used as part of a place name (for example, the English villages of Compton Abbas and Milton Abbas). The name usually relates to land previously owned by an abbess.
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Abdominal surgery
The term abdominal surgery broadly covers surgical procedures that involve opening the abdomen (laparotomy). Surgery of each abdominal organ is dealt with separately in connection with the description of that organ (see stomach, kidney, liver, etc.) Diseases affecting the abdominal cavity are dealt with generally under their own names.
Types.
The most common abdominal surgeries are described below.
Complications.
Complications of abdominal surgery include, but are not limited to:
Sterile technique, aseptic post-operative care, antibiotics, use of the WHO Surgical Safety Checklist, and vigilant post-operative monitoring greatly reduce the risk of these complications. Planned surgery performed under sterile conditions is much less risky than that performed under emergency or unsterile conditions. The contents of the bowel are unsterile, and thus leakage of bowel contents, as from trauma, substantially increases the risk of infection.
Globally, there are few studies comparing perioperative mortality following abdominal surgery across different health systems. One major prospective study of 10,745 adult patients undergoing emergency laparotomy from 357 centres in 58 high-, middle-, and low-income countries found that mortality is three times higher in low- compared with high-HDI countries even when adjusted for prognostic factors. In this study the overall global mortality rate was 1.6 percent at 24 hours (high 1.1 percent, middle 1.9 percent, low 3.4 percent), increasing to 5.4 percent by 30 days (high 4.5 percent, middle 6.0 percent, low 8.6 percent). Of the 578 patients who died, 404 (69.9 percent) did so between 24 hours and 30 days following surgery (high 74.2 percent, middle 68.8 percent, low 60.5 percent). Patient safety factors were suggested to play an important role, with use of the WHO Surgical Safety Checklist associated with reduced mortality at 30 days.
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Taking a similar approach, a unique global study of 1,409 children undergoing emergency laparotomy from 253 centres in 43 countries showed that adjusted mortality in children following surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries, translating to 40 excess deaths per 1,000 procedures performed in these settings. Internationally, the most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23)) and middle-HDI (4.42 (1.44 to 13.56)) countries compared with high-HDI countries.
Absorption of drugs administered orally was shown to be significantly affected following abdominal surgery.
There is low-certainty evidence that there is no difference between using scalpel and electrosurgery in infection rates during major abdominal surgeries.
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Abensberg
Abensberg () is a town in the Lower Bavarian district of Kelheim, in Bavaria, Germany, lying around southwest of Regensburg, east of Ingolstadt, northwest of Landshut and north of Munich. It is situated on the river Abens, a tributary of the Danube.
Geography.
The town lies on the Abens river, a tributary of the Danube, around eight kilometres from the river's source. The area around Abensberg is characterized by the narrow valley of the Danube, where the Weltenburg Abbey stands, the valley of the Altmühl in the north, a left tributary of the Danube, and the famous Hallertau hops-planting region in the south. The town is divided into the municipalities of Abensberg, Arnhofen, Holzharlanden, Hörlbach, Offenstetten, Pullach and Sandharland.
Divisions.
Since the administrative reforms in Bavaria in the 1970s, the town also encompasses the following "Ortsteile":
History.
There had been settlement on this part of the Abens river since long before the High Middle Ages, dating back to Neolithic times. Of particular interest and national importance are the Neolithic flint mines at Arnhofen, where, around 7,000 years ago, Stone Age people made flint, which was fashioned into drills, blades and arrowheads, and was regarded as the steel of the Stone Age. Traces of over 20,000 individuals were found on this site. The modern history of Abensberg, which is often incorrectly compared with that of the third century Roman castra (military outpost) of Abusina, begins with Gebhard, who was the first to mention Abensberg as a town, in the middle of the 12th century. The earliest written reference to the town, under the name of "Habensperch", came from this time, in around 1138. Gebhard was from the Babonen clan.
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In 1256, the castrum of "Abensprech" was first mentioned, and on 12 June 1348, Margrave Ludwig of Brandenburg, and his brother, Duke Stephen of Bavaria, raised Abensberg to the status of a city, giving it the right to operate lower courts, enclose itself with a wall and hold markets. The wall was built by Count Ulrich III of Abensberg. Some of the thirty-two round towers and eight turrets are still preserved to this day.
In the Middle Ages, the people of Abensberg enjoyed a level of autonomy above their lord. They elected a city council, although only a small number of rich families were eligible for election.
In around 1390, the Carmelite Monastery of Our Lady of Abensberg was founded by Count John II and his wife, Agnes. Although Abensberg was an autonomous city, it remained dependent on the powerful Dukes of Bavaria. The last Lord of Abensberg, Niclas, Graf von Abensberg, supposedly named after his godfather, Nicholas of Kues, a Catholic cardinal, was murdered in 1485 by Christopher, a Duke of Bavaria-Munich. The year before, Niclas had unchivalrously taken Christopher captive as he bathed before a tournament in Munich. Although Christopher renounced his claim for revenge, he lay in wait for Niclas in Freising. When the latter arrived, he was killed by Seitz von Frauenberg. He is buried in the former convent of Abensberg.
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Abensberg then lost its independence and became a part of the Duchy of Bavaria, and from then on was administered by a ducal official, the so-called caretaker. The castle of Abensberg was destroyed during the Thirty Years' War, although the city had bought a guarantee of protection from the Swedish general, Carl Gustaf Wrangel. During the War of the Spanish Succession emperor Leopold I, who had occupied Bavaria, granted the fief of Abensberg to count Ernst von Abensperg und Traun (1608–1668) from an Austrian noble family named Traun that now received the name of the former counts of Abensberg (who were believed to be distant relatives). After the occupation ended, he was however dispossessed.
Johannes Aventinus (1477–1534) is the city's most famous son, the founder of the study of history in Bavaria. Aventinus, whose name was real name is Johann or Johannes Turmair ("Aventinus" being the Latin name of his birthplace) wrote the "Annals of Bavaria", a valuable record of the early history of Germany and the first major written work on the subject. He is commemorated in the Walhalla temple, a monument near Regensburg to the distinguished figures of German history. Until 1800, Abensberg was a municipality belonging to the Straubing district of the Electorate of Bavaria. Abensberg also contained a magistrates' court. In the Battle of Abensberg on 19–20 April 1809, Napoleon gained a significant victory over the Austrians under Archduke Ludwig of Austria and General Johann von Hiller.
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Coat of arms.
The arms of the city are divided into two halves. On the left are the blue and white rhombuses of Bavaria, while the right half is split into two silver and black triangles. Two diagonally-crossed silver swords with golden handles rest on top.
The town has had a coat of arms since 1338, that of the Counts of Abensberg. With the death of the last Count, Nicholas of Abensberg, in 1485, the estates fell to the Duchy of Bavaria-Munich, meaning that henceforth only the Bavarian coat of arms was ever used.
On 31 December 1809, a decree of King Maximilian of Bavaria granted the city a new coat of arms, as a recognition of their (mainly humanitarian and logistic) services in the Battle of Abensberg the same year. The diagonally divided field in silver and black came from the old crest of the Counts of Abensberg, while the white and blue diamonds came from that of the House of Wittelsbach, the rulers of Bavaria. The swords recall the Battle of Abensberg.
The district of Offenstetten previously possessed its own coat of arms.
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Economy and Infrastructure.
The area around Abensberg, the so-called sand belt between Siegburg, Neustadt an der Donau, Abensberg and Langquaid, is used for the intensive farming of asparagus, due to the optimal soil condition and climate. 212 hectares of land can produce ninety-four asparagus plants. Abensberg asparagus enjoys a reputation among connoisseurs as a particular delicacy. In addition to asparagus, the production of hops plays a major role locally, the region having its own label, and there are still three independent breweries in the area. The town of Abensberg marks the start of the "Deutsche Hopfenstraße" ("German Hops Road"), a nickname given to the Bundesstraße 301, a German federal highway which runs through the heartland of Germany's hops-growing industry, ending in Freising.
Transport.
The Abensberg railway station is located on the Regensburg–Ingolstadt railway from Regensburg to Ingolstadt. The city can be reached via the A-93 Holledau-Regensburg road (exit Abensberg). Three Bundesstraße (German federal highways) cross south of Abensberg: B 16, B 299 and B 301.
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Public facilities.
Schools.
Abensberg has two Grundschulen (primary school) and Mittelschule (open admission secondary school), and the Johann-Turmair-Realschule (secondary modern school). There is also a College of Agriculture and Home Economics. Since 2007, the Kelheim Berufsschule has had a campus in Abensberg, and outside the state sector is the St. Francis Vocational Training Centre, run by a Catholic youth organisation. In addition, there are two special schools, one near Abensberg, the other in the civil parish of Offenstetten.
Culture and sightseeing.
Theatre.
In 2008, a former goods shed by the main railway station of Abensberg was converted into a theatre by local volunteers. The "Theater am Bahnhof" ("Theatre at the Railway Station") is mostly used by the "Theatergruppe Lampenfieber" and was opened on 19 October 2008.
Museums.
Abensberg has a long tradition of museums. In the nineteenth century, Nicholas Stark und Peter Paul Dollinger began a collection based on local history. This collection and the collection of the "Heimatverein" (local history society) were united in 1963 into the Aventinus Museum, in the cloister of the former Carmelite monastery. On 7 July 2006, the new Town Museum of Abensberg was opened in the former duke's castle in the town.
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Kuchlbauer Brewery.
Two blocks west of the Old Town is the Kuchlbauer Brewery and beer garden featuring the Kuchlbauer Tower, a colorful and unconventional observation tower designed by Viennese architect Friedensreich Hundertwasser. The brewery and tower are open to the public.
Missing memorial.
Up until the 1950s, Abensberg and the surrounding villages contained a number of graves of victims of a Death March in the spring of 1945 from the Hersbruck sub-camp of the Dachau concentration camp, who were either murdered by the SS or died of exhaustion. They were originally buried where they died, but were later moved on the orders of the US military government to the cemeteries of their previous homes. At the cemetery in what is now the district of Pullach stood a memorial stone which was mentioned as recently as 1967, but which is no longer at the site. The suffering of ten unknown victims of the camp was recorded on the stone.
Sport.
Speedway and football.
The Wack Hofmeister Stadium, formerly the Altes Stadion Abensberg (the Old Stadium) is a motorcycle speedway and association football stadium located slightly east of the centre of Abensberg in Germany. It hosts the speedway team MSC Abensberg and the football team TSV Abensberg 1862.
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Arminianism
Arminianism is a movement of Protestantism initiated in the early 17th century, based on the theological ideas of the Dutch Reformed theologian Jacobus Arminius and his historic supporters known as Remonstrants. Dutch Arminianism was originally articulated in the "Remonstrance" (1610), a theological statement submitted to the States General of the Netherlands. This expressed an attempt to moderate the doctrines of Calvinism related to its interpretation of predestination.
Classical Arminianism, to which Arminius is the main contributor, and Wesleyan Arminianism, to which John Wesley is the main contributor, are the two main schools of thought. Central Arminian beliefs are that God's prevenient grace, which prepares regeneration, is universal and that His grace, allowing regeneration and ongoing sanctification, is resistible.
Many Christian denominations have been influenced by Arminian views, notably the Baptists in the 17th century, the Methodists in the 18th century, and the Pentecostals in the 20th century.
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History.
Precursor movements and theological influences.
Arminius' beliefs, i.e. Arminianism, did not begin with him. Before the Reformation, groups like the Waldensians similarly affirmed individual freedom over any predetermined predestination. Anabaptist theologian Balthasar Hubmaier (1480–1528) also promoted much the same view as Arminius nearly a century before him. The soteriological doctrines of Arminianism and Anabaptism are roughly equivalent. In particular, Mennonites have been historically Arminian whether they distinctly espoused the Arminian viewpoint or not, and rejected Calvinist soteriology. Anabaptist theology seems to have influenced Jacobus Arminius. At least, he was "sympathetic to the Anabaptist point of view, and Anabaptists were commonly in attendance on his preaching." Similarly, Arminius mentions Danish Lutheran theologian Niels Hemmingsen (1513–1600) as holding the basic view of soteriology he held and he may have been influenced by Hemmingsen. Another key figure, Sebastian Castellio (1515–1563), who opposed Calvin's views on predestination and religious intolerance, is known to have influenced both the Mennonites and certain theologians within Arminius’s circle. Early critics of Arminians even cited Castellio as a primary inspiration behind the Arminian movement.
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Emergence of Arminianism.
Jacobus Arminius (1560-1609) was a Dutch pastor and theologian. He was taught by Theodore Beza, Calvin's hand-picked successor, but after examination of the scriptures, he rejected his teacher's theology that it is God who unconditionally elects some for salvation. Instead Arminius proposed that the election of God was "of believers", thereby making it conditional on faith. Arminius's views were challenged by the Dutch Calvinists, especially Franciscus Gomarus.
In his "Declaration of Sentiments" (1608) Arminius presented his theology to magistrates of the States General of the Netherlands in The Hague. After his death, Arminius's followers continued to advance his theological vision, crafting the "Five articles of Remonstrance" (1610), in which they express their points of divergence from the stricter Calvinism of the "Belgic Confession". This is how Arminius's followers were called Remonstrants, and following a "Counter Remonstrance" in 1611, Gomarus' followers were called Counter-Remonstrants.
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After some political maneuvering, the Dutch Calvinists were able to convince Prince Maurice of Nassau to deal with the situation. Maurice systematically removed Arminian magistrates from office and called a national synod at Dordrecht. This Synod of Dort was open primarily to Dutch Calvinists (102 people), while the Arminians were excluded (13 people banned from voting), with Calvinist representatives from other countries (28 people), and in 1618 published a condemnation of Arminius and his followers as heretics. The Canons of Dort responded, among other topics, to Arminian doctrines, anticipating their later articulation as the Five points of Calvinism.
Arminians across Holland were removed from office, imprisoned, banished, and sworn to silence. Twelve years later, Holland officially granted Arminianism protection as a religion, although animosity between Arminians and Calvinists continued. Most of the early Remonstrants followed a classical version of Arminianism. However, some of them such as Philipp van Limborch, moved in the direction of semi-Pelagianism and rationalism.
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Arminianism in the Church of England.
In England, the so-labelled Arminian doctrines were held, in substance, before and in parallel with those of Arminius. The Thirty-nine Articles of Religion (finalised in 1571), were sufficiently ambiguous that they were compatible with either Arminian or Calvinistic interpretations. Arminianism in the Church of England was fundamentally an expression of negation of Calvinism, and only some theologians held to classical Arminianism, but for the rest they were either semi-Pelagian or Pelagian. In this specific context, contemporary historians prefer to use the term "proto-Arminians" rather than "Arminians" to designate the leanings of those divines who generally didn't follow classical Arminianism. English Arminianism was represented by Arminian Puritans such as John Goodwin or High Anglican Arminians such as Jeremy Taylor and Henry Hammond. Anglican Arminians of the 17th century such as William Laud fought Calvinist Puritans. They actually saw Arminianism in terms of a state church, an idea that was alien to the views of Arminius. This position became particularly evident under the reign (1625–1649) of Charles I of England. Following the English Civil War (1642–1651) Charles II of England, who tolerated the Presbyterians, re-instituted Arminian thought in the Church of England. It was dominant there after the Restoration (1660) for some fifty years.
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Baptists.
The Baptist movement emerged in 17th-century in England. The first Baptists—called "General Baptists" because of their confession of a "general" or unlimited atonement—were Arminians. The Baptist movement originated with Thomas Helwys, who left his mentor John Smyth (who had moved into shared belief and other distinctives of the Dutch Waterlander Mennonites of Amsterdam) and returned to London to start the first English Baptist Church in 1611. Later General Baptists such as John Griffith, Samuel Loveday, and Thomas Grantham defended a Reformed Arminian theology that reflected the Arminianism of Arminius. The General Baptists encapsulated their Arminian views in numerous confessions, the most influential of which was the Standard Confession of 1660. In the 1640s the Particular Baptists were formed, diverging from Arminian doctrine and embracing the strong Calvinism of the Presbyterians and Independents. Their robust Calvinism was publicized in such confessions as the London Baptist Confession of 1644 and the Second London Confession of 1689. The London Confession of 1689 was later used by Calvinistic Baptists in America (called the Philadelphia Baptist Confession), whereas the Standard Confession of 1660 was used by the American heirs of the English General Baptists, who soon came to be known as Free Will Baptists.
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Methodists.
In the Methodist-Calvinist controversy of the early 1770s involving Anglican ministers John Wesley and George Whitefield, Wesley responded to accusations of semi-Pelagianism by embracing an Arminian identity. Wesley had limited familiarity with the beliefs of Arminius and largely formulated his views without direct reliance on Arminius' teachings. Wesley was notably influenced by 17th-century English Arminianism and by some Remonstrant spokesmen. However, he is recognized as a faithful representative of Arminius' beliefs. Wesley defended his soteriology through the publication of a periodical titled "The Arminian" (1778) and in articles such as "Predestination Calmly Considered". To support his stance, he strongly maintained belief in total depravity while clarifying other doctrines notably prevenient grace. At the same time, Wesley attacked the determinism that he claimed characterized Calvinist doctrines of predestination. He typically preached the notion of Christian perfection (fully mature, not "sinlessness"). His system of thought has become known as Wesleyan Arminianism, the foundations of which were laid by him and his fellow preacher John William Fletcher. Methodism also navigated its own theological intricacies concerning salvation and human agency. In the 1830s, during the Second Great Awakening, traces of Pelagian influence surfaced in the American Holiness Movement. Consequently, critics of Wesleyan theology have occasionally unfairly perceived or labeled its broader thought. However, its core is recognized to be Arminianism.
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Pentecostals.
Pentecostalism has its background in the activity of Charles Parham (1873–1929). Its origin as a movement was in the Azusa Street Revival in Los Angeles in 1906. This revival was led by William J. Seymour (1870–1922). Due to the Methodist and Holiness background of many early Pentecostal preachers, the Pentecostal churches usually possessed practices that arose from the Wesleyan Arminianism. During the 20th century, as Pentecostal churches began to settle and incorporate more standard forms, they started to formulate theology that was fully Arminian. Today, Pentecostal denominations such as the Assemblies of God hold to Arminian views such as resistible grace, conditional election, and conditional security of the believer.
Current landscape.
Protestant denominations.
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Scholarly support.
Arminian theology has found support among theologians, Bible scholars, and apologists spanning various historical periods and theological circles. Noteworthy historical figures include Jacobus Arminius, Simon Episcopius, Hugo Grotius, John Goodwin, Thomas Grantham, John Wesley, Richard Watson, Thomas Osmond Summers, John Miley, William Burt Pope and Henry Orton Wiley.
In contemporary Baptist traditions, advocates of Arminian theology include Roger E. Olson, F. Leroy Forlines, Robert Picirilli and J. Matthew Pinson. Within the Methodist tradition, prominent supporters encompass Thomas Oden, Ben Witherington III, David Pawson, B. J. Oropeza, Thomas H. McCall and Fred Sanders. The Holiness movement boasts theologians like Carl O. Bangs and J. Kenneth Grider. Furthermore, scholars such as Keith D. Stanglin, Craig S. Keener and Grant R. Osborne also support Arminian perspectives.
Theology.
Theological legacy.
The Pelagian-Augustinian framework can serve as a key paradigm for understanding Arminianism's theological and historical legacy. Before Augustine (354–430), the synergistic view of salvation was almost universally endorsed. Pelagius (c. 354–418), however, argued that humans could perfectly obey God by their own will. The Pelagian view is therefore referred to as "humanistic monergism". This view was condemned at the Council of Carthage (418) and Ephesus (431). In response, Augustine proposed a view in which God is the ultimate cause of all human actions, a stance that aligns with soft determinism. The Augustinian view is therefore referred to as "divine monergism". However, Augustinian soteriology implied double predestination, which was condemned by the Council of Arles (475).
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During this period, a moderate form of Pelagianism emerged, later termed Semi-Pelagianism. This view asserted that human will initiates salvation, rather than divine grace. The Semi-Pelagian view is therefore described as "human-initiated synergism". In 529, the Second Council of Orange addressed Semi-Pelagianism and declared that even the inception of faith is a result of God’s grace. This highlights the role of prevenient grace enabling human belief. This view, often referred to as "Semi-Augustinian," is therefore described as "God-initiated synergism". The Council also rejected predestination to evil. As Arminianism aligns with key aspects of this view, some see it as a return to early Church theological consensus. Moreover, Arminianism can also be seen as a soteriological diversification of Calvinism or, more specifically, as a theological middle ground between Calvinism and semi-Pelagianism.
Arminian theology generally divides into two main variations: Classical Arminianism, based on the teachings of Jacobus Arminius, and Wesleyan Arminianism, a closely related variation shaped primarily by John Wesley.
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Classical Arminianism.
Definition and terminology.
Classical Arminianism is a protestant theological view, that asserts God's prevenient grace for regeneration is universal and that the grace allowing regeneration and ongoing sanctification is resistible. This theological system was presented by Jacobus Arminius and maintained by some of the Remonstrants, such as Simon Episcopius and Hugo Grotius.
Arminian theology incorporates the language and framework of covenant theology. Its core teachings are summarized in the "Five Articles of Remonstrance", reflecting Arminius’s views, with some sections directly from his "Declaration of Sentiments". Some theologians have referred to this system as "classical Arminianism". Others prefer "Reformation Arminianism" or "Reformed Arminianism", as Arminius upheld the principles of Reformation such as "Sola fide" and "Sola gratia".
God's providence and human free will.
Arminianism accepts classical theism, which states that God is omnipresent, omnipotent, and omniscient. In that view, God's power, knowledge, and presence have no external limitations, that is, outside of his divine nature and character.
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Besides, Arminianism's view of God's sovereignty is based on postulates stemming from God's character. On the first hand, divine election must be defined so that God is not, in any case, and even in a secondary way, the author of evil. It would not correspond to the character of God, especially as fully revealed in Jesus Christ. On the other hand, man's responsibility for evil must be preserved. Those two postulates require a specific way by which God chooses to manifest his sovereignty when interacting with his creatures.
On one hand, it requires God to operate according to a limited mode of providence. This means that God deliberately exercises sovereignty without determining every event. On the other hand, it requires God's election to be a "predestination by foreknowledge". Therefore, God's foreknowledge is exhaustive and complete, aligning his certainty with human freedom of action.
Philosophical view on free will.
Arminianism is aligned with classical free-will theism, adopting an incompatibilist position. It asserts that the free will essential for moral responsibility is inherently incompatible with determinism. In Arminian theology, human beings possess libertarian free will, making them the ultimate source of their choices and granting them the ability to choose otherwise. This philosophical framework upholds the concept of divine providence, allowing God's influence and supervision over creation. However, it permits the idea of God's absolute control over human actions, as long as such control does not involve human responsibility.
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Spiritual view on free will.
Arminianism holds that all human are initially deprived of the Holy Spirit and, as a result, exist in a moral state of total depravity. In this condition, human free will is incapable of choosing spiritual good without the aid of divine grace. Arminius likely believed that every person is born in this depraved condition because Adam, as humanity’s representative, sinned against God—a view later shared by several prominent Arminians. Like Augustine, Luther, and Calvin, Arminius agreed that human free will is spiritually "captive" and "enslaved". However, through the action of prevenient grace, human free will can be "freed", meaning it can be restored with the ability to choose the spiritual good, particularly the capacity to accept God's call to salvation.
Extent and nature of the atonement.
Atonement is intended universally: Jesus's death was for all people; Jesus draws all people to himself, with the opportunity for salvation through faith.
Jesus's death satisfies God's justice: The penalty for the sins of the elect is paid in full through the crucifixion of Jesus. Thus, Jesus’s death atones for all sins but requires faith to be effected. Arminius states that "Justification, when used for the act of a Judge, is either purely the imputation of righteousness through mercy [...] or that man is justified before God [...] according to the rigor of justice without any forgiveness." Justification, therefore, is seen through mercy by the imputation of righteousness. While not rigidly defined, this view suggests that the righteousness of Christ is attributed to believers, emphasizing that union with Christ (conditioned on faith) transfers his righteousness to them.
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Christ's atonement has a substitutionary effect, which is limited only to the elect. Arminius held that God's justice was satisfied by penal substitution. Hugo Grotius taught that it was satisfied governmentally. Historical and contemporary Arminians have held one of these views.
Conversion of man.
In Arminianism, God initiates the process of salvation by extending his grace, commonly referred to as "prevenient" grace, to all people. This grace works within each individual, drawing them toward the Gospel and enabling sincere faith, leading to regeneration. It functions through a dynamic influence-and-response relationship, allowing individuals to accept or reject it freely. Thus, conversion is described as a "God-initiated synergism."
Election of man.
Election is conditional: Arminius defined "election" as "the decree of God by which, of Himself, from eternity, He decreed to justify in Christ, believers, and to accept them unto eternal life." God alone determines who will be saved, and he decides that all who believe Jesus through faith will be justified. Arminius states, "God regards no one in Christ unless they are engrafted in him by faith."
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God predestines the elect to a glorious future: Predestination is not the predetermination of who will believe but rather the predetermination of the believer's future inheritance. The elect are therefore predestined to sonship through adoption, glorification, and eternal life.
Preservation of man.
Related to eschatological considerations, Jacobus Arminius and the first Remonstrants, including Simon Episcopius believed in everlasting fire where the wicked are thrown by God at judgment day.
Preservation is conditional: All believers have full assurance of salvation with the condition that they remain in Christ. Salvation is conditioned on faith; therefore, perseverance is also conditioned. Arminius believed the Scriptures taught that believers are graciously empowered by Christ and the Holy Spirit "to fight against Satan, sin, the world and their own flesh, and to gain the victory over these enemies." Furthermore, Christ and the Spirit are ever present to aid and assist believers through various temptations. But this security was not unconditional but conditional—"provided they [believers] stand prepared for the battle, implore his help, and be not wanting to themselves, Christ preserves them from falling."
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Possibility of apostasy.
Arminius believed in the possibility of apostasy. However, over the period of time he wrote on this question, he sometimes expressed himself more cautiously out of consideration for the faith of his readers. In 1599, he stated that the question required more scriptural examination. In his "Declaration of Sentiments" (1607), Arminius said, "I never taught that a true believer can, either totally or finally fall away from the faith, and perish; yet I will not conceal, that there are passages of scripture which seem to me to wear this aspect."
However, Arminius elsewhere expressed certainty about the possibility of falling away: In c. 1602, he noted that a person integrated into the church might resist God's work and that a believer's security rested solely on their choice not to abandon their faith. He argued that God's covenant did not eliminate the possibility of falling away but provided a gift of fear to keep individuals from defecting as long as it thrived in their hearts. He then taught that had David died in sin, he would have been lost. In 1602, Arminius also wrote: "A believing member of Christ may become slothful, give place to sin, and gradually die altogether, ceasing to be a member".
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For Arminius, a certain class of sin would cause a believer to fall, especially sin motivated by malice. In 1605, Arminius wrote: “But it is possible for a believer to fall into a mortal sin, as is seen in David. Therefore, he can fall at that moment in which if he were to die, he would be condemned". Scholars observe that Arminius clearly identifies two paths to apostasy 1. "rejection", or 2. "malicious sinning". He suggested that strictly speaking, believers could not directly lose their faith but could cease to believe and thus fall away.
After the death of Arminius in 1609, his followers wrote a "Remonstrance" (1610) based quite literally on his "Declaration of Sentiments" (1607), which expressed prudence on the possibility of apostasy. In particular, its fifth article expressed the necessity of further study on the possibility of apostasy. Sometime between 1610 and the official proceeding of the Synod of Dort (1618), the Remonstrants became fully persuaded in their minds that the Scriptures taught that a true believer was capable of falling away from faith and perishing eternally as an unbeliever. They formalized their views in "The Opinion of the Remonstrants" (1618), which was their official stand during the Synod of Dort. They later expressed this same view in the "Remonstrant Confession" (1621).
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Forgivability of apostasy.
Arminius maintained that if the apostasy came from "malicious" sin, it was forgivable. If it came from "rejection," it was not. Following Arminius, the Remonstrants believed that, though possible, apostasy was not in general irremediable. However, other classical Arminians, including the Free Will Baptists, have taught that apostasy is irremediable.
Wesleyan Arminianism.
Distinctive aspect.
John Wesley thoroughly agreed with the vast majority of what Arminius himself taught. Wesleyan Arminianism is a merger of classical Arminianism and Wesleyan perfectionism.
Nature of the atonement.
Wesley’s view of atonement is either understood as a hybrid of penal substitution and the governmental theory, or it is viewed solely as penal substitution. Historically, Wesleyan Arminians adopted either the penal or governmental theory of atonement.
Justification and sanctification.
In Wesleyan theology, justification is understood as the forgiveness of sins rather than being made inherently righteous. Righteousness is achieved through sanctification, which involves the pursuit of holiness in one's life. Wesley taught that imputed righteousness, which refers to the righteousness credited to a believer through faith, must transform into imparted righteousness, where this righteousness becomes evident in the believer’s life.
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Christian perfection.
Wesley taught that through the Holy Spirit, Christians could achieve a state of practical perfection, or "entire sanctification", characterized by a lack of voluntary sin. This state involves embodying the love of God and neighbor. It does not mean freedom from all mistakes or temptations, as perfected Christians still need to seek forgiveness and strive for holiness. Ultimately, perfection in this context is about love, not absolute perfection.
Preservation and apostasy of man.
Wesley believed genuine Christians could apostatize. He emphasized that sin alone does not lead to this loss; instead, prolonged unconfessed sin and deliberate apostasy can result in a permanent fall from grace. However, he believed that such apostasy was not irremediable.
Corporate election variation.
The majority Arminian view is that election is individual and based on God's foreknowledge of faith. In the corporate election view, God chose the believing church collectively for salvation rather than selecting individuals. Jesus is seen as the only person elected, and individuals join the elect through faith "in Christ". This view is supported by Old Testament and Jewish concepts, where identity is rooted more in group membership than individuality.
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Arminianism and other views.
Divergence with Pelagianism.
Pelagianism is a doctrine denying original sin and total depravity. No system of Arminianism founded on Arminius or Wesley denies original sin or total depravity; both Arminius and Wesley "strongly" affirmed that man's basic condition is one in which he cannot be righteous, understand God, or seek God. Arminius referred to Pelagianism as "the grand falsehood" and stated that he "must confess that I detest, from my heart, the consequences [of that theology]." This association is considered as libelous when attributed to Arminius' or Wesley's doctrine, and Arminians reject all accusations of Pelagianism.
Divergence with Semi-Pelagianism.
Semi-Pelagianism holds that faith begins with human will, while its continuation and fulfillment depend on God's grace, giving it the label "human-initiated synergism". In contrast, both Classical and Wesleyan Arminianism affirm that prevenient grace from God initiates the process of salvation, a view sometimes referred to as "Semi-Augustinian", or "God-initiated synergism". Following the Reformation, Reformed theologians often categorized both "human-initiated synergism" and "God-initiated synergism" as "Semi-Pelagianism", often leading to mistaken belief that Arminianism aligned with Semi-Pelagianism.
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Divergence with Calvinism.
Calvinism and Arminianism, while sharing historical roots and many theological doctrines, diverge notably on the concepts of divine predestination and election. While some perceive these differences as fundamental, others regard them as relatively minor distinctions within the broader spectrum of Christian theology.
Divergence with open theism.
The doctrine of open theism states that God is omnipresent, omnipotent, and omniscient, but differs on the nature of the future. Open theists claim that the future is not completely determined (or "settled") because people have not made their free decisions yet. God therefore knows the future partially in possibilities (human free actions) rather than solely certainties (divinely determined events). Some Arminians, reject open theism, viewing it as a distortion of traditional Arminianism. They believe it shifts away from classical Arminianism toward process theology. Others view it as a valid alternative perspective within Christianity, despite not aligning it with Arminian doctrine.
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The Alan Parsons Project
The Alan Parsons Project was a British rock band formed in London in 1975. Its core membership consisted of producer, audio engineer, musician and composer Alan Parsons, and singer, songwriter and pianist Eric Woolfson. They shared writing credits on almost all of their songs, with Parsons producing or co-producing all of the recordings, while being accompanied by various session musicians, some relatively consistent.
The Alan Parsons Project released eleven studio albums over a 15-year career, the most successful ones being "I Robot" (1977), "The Turn of a Friendly Card" (1980) and "Eye in the Sky" (1982). Many of their albums are conceptual in nature and focus on science fiction, supernatural, literary and sociological themes. Among the group's most popular songs are "I Wouldn't Want to Be Like You", "Games People Play", "Time", "Sirius", "Eye in the Sky", and "Don't Answer Me".
Career.
1974–1976: Formation and debut.
Alan Parsons met Eric Woolfson in the canteen of Abbey Road Studios in the summer of 1974. Parsons was assistant engineer on the Beatles' albums "Abbey Road" (1969) and "Let It Be" (1970), engineered Pink Floyd's "The Dark Side of the Moon" (1973), and produced several acts for EMI Records. Woolfson, a songwriter and composer, was working as a session pianist while composing material for a concept album based on the work of Edgar Allan Poe.
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Woolfson's idea was to manage Alan and help his already successful production career. It was the start of a longstanding friendly business relationship. He managed Parsons's career as a producer and engineer through a string of successes, including Pilot, Steve Harley, Cockney Rebel, John Miles, Al Stewart, Ambrosia, and the Hollies. Woolfson came up with the idea of making an album based on developments in the film industry—the focal point of the films' promotion shifted from film stars to directors such as Alfred Hitchcock and Stanley Kubrick. If the film industry was becoming a director's medium, Woolfson felt the music business might well become a producer's medium.
Recalling his earlier Edgar Allan Poe material, Woolfson saw a way to combine his and Parsons's talents. Parsons produced and engineered songs written and composed by the two, and the first Alan Parsons Project was begun. The Project's first album, "Tales of Mystery and Imagination" (1976), released by 20th Century Fox Records and including major contributions by all members of Pilot and Ambrosia, was a success, reaching the Top 40 in the US "Billboard" 200 chart. The song "The Raven" featured lead vocals by the actor Leonard Whiting. According to the 2007 re-mastered album liner notes, this was the first rock song to use a vocoder, with Alan Parsons speaking lyrics through it, although others such as Bruce Haack pioneered this field in the previous decade.
1977–1990: Mainstream success and final releases.
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Arista Records then signed the Alan Parsons Project for further albums. Through the late 1970s and early 1980s, the Project's popularity continued to grow. The Project was always more popular in North America, Ibero-America, and Continental Europe than in Parsons' home country, never achieving a UK Top 40 single or Top 20 album. The singles "I Wouldn't Want to Be Like You", "Games People Play", "Damned If I Do", "Time" (the first single to feature Woolfson's lead vocal) and "Eye in the Sky" had a notable impact on the "Billboard" Hot 100. "Don't Answer Me" became the Project's last successful single in the United States; it reached the top 15 on the American charts in 1984.
After those successes, the Project began to fade from view. There were fewer hit singles, and declining album sales. 1987's "Gaudi" was the Project's final release, though it had planned to record an album called "Freudiana" (1990) next.
The musical "Freudiana".
Even though the studio version of "Freudiana" was produced by Parsons (and featured the regular Project session musicians, making it an 'unofficial' Project album), it was primarily Woolfson's idea to turn it into a musical. While Parsons pursued his own solo career and took many session players of the Project on the road for the first time in a successful worldwide tour, Woolfson went on to produce musical plays influenced by the Project's music. "Freudiana", "Gaudi", and "Gambler" were three musicals that included some Project songs like "Eye in the Sky", "Time", "Inside Looking Out", and "Limelight". The live music from "Gambler" was only distributed at the performance site in Mönchengladbach, Germany.
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"The Sicilian Defence".
In 1979, Parsons, Woolfson, and their record label Arista, had been stalled in contract renegotiations when the two submitted an all-instrumental album tentatively titled "The Sicilian Defence", named after an aggressive opening move in chess. Arista's refusal to release the album had two known effects: the negotiations led to a renewed contract, and the album was not released at that time.
In interviews he gave before his death in 2009, Woolfson said he planned to release one track from the "Sicilian" album, which in 2008 appeared as a bonus track on a CD re-issue of the "Eve" album. Sometime later, after he had relocated the original tapes, Parsons reluctantly agreed to release the album and announced that it would finally be released on an upcoming Project box set called "The Complete Albums Collection" in 2014 for the first time as a bonus disc.
Parsons's and Woolfson's solo careers.
Parsons released titles under his name: "Try Anything Once" (1993), "On Air" (1996), "The Time Machine" (1999), "A Valid Path" (2004), "The Secret" (2019) and "From the New World" (2022). Meanwhile, Woolfson made concept albums titled "Freudiana" (1990), about Sigmund Freud's work on psychology, and "" (2003), continuing from the Alan Parsons Project's first album about Poe literature.
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"Tales of Mystery and Imagination" (1976) was re-mixed in 1987 for release on CD, and included narration by Orson Welles recorded in 1975, but delivered too late to be included on the original album. For the 2007 deluxe edition release, parts of this tape were used for the 1976 Griffith Park Planetarium launch of the original album, the 1987 remix, and various radio spots. All were included as bonus material.
Sound.
The band's sound is described as progressive rock, art rock, progressive pop, and soft rock. "Sirius" is their best-known and most-frequently heard of all Parsons/Woolfson songs. It was used as entrance music by various American sports teams, notably by the Chicago Bulls during their 1990s NBA dynasty. It was also used as the entrance theme for Ricky Steamboat in pro wrestling of the mid-1980s. In addition, "Sirius" is played in a variety of TV shows and movies including the BBC series Record Breakers, the episode "Vanishing Act" of "" and the 2009 film "Cloudy with a Chance of Meatballs".
Vocal duties were shared by guests to complement each song. In later years, Woolfson sang lead on many of the group's hits, including "Time", "Eye in the Sky", and "Don't Answer Me". The record company pressured Parsons to use Woolfson more, but Parsons preferred to use polished proficient singers; Woolfson admitted he was not in that category. In addition to Woolfson, vocalists Chris Rainbow, Lenny Zakatek, John Miles, David Paton, and Colin Blunstone are regulars. Other singers, such as Arthur Brown, Steve Harley, Gary Brooker, Dave Terry a.k.a. Elmer Gantry, Vitamin Z's Geoff Barradale, and Marmalade's Dean Ford, recorded only once or twice with the Project. Parsons sang lead on one song ("The Raven") through a vocoder and backing on a few others, including "To One in Paradise". Both of those songs appeared on "Tales of Mystery and Imagination" (1976). Parsons also sings a prominent counter melody on "Time".
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A variety of session musicians worked with the Alan Parsons Project regularly, contributing to the recognizable style of a song despite the varied singer line-up. With Parsons and Woolfson, the studio band consisted of the group Pilot, with Ian Bairnson (guitar), David Paton (bass) and Stuart Tosh (drums). Pilot's keyboardist Billy Lyall contributed. From "Pyramid" (1978) onward, Tosh was replaced by Stuart Elliott of Cockney Rebel. Bairnson played on all albums, and Paton stayed almost until the end. Andrew Powell appeared as arranger of orchestra (and often choirs) on all albums except "Vulture Culture" (1985); he was composing the score of Richard Donner's film "Ladyhawke" (1985). This score was partly in the APP style, recorded by most of the APP regulars, and produced and engineered by Parsons. Powell composed some material for the first two Project albums. For "Vulture Culture" and later, Richard Cottle played as a regular contributor on synthesizers and saxophone.
The Alan Parsons Project played live only once under that name during its original incarnation because Woolfson and Parsons held the roles of writing and production, and because of the technical difficulties of re-producing on stage the complex instrumentation used in the studio. In the 1990s, musical production evolved with the technology of digital samplers. The one occasion the band was introduced as 'the Alan Parsons Project' in a live performance was at The Night of the Proms in October 1990. The concerts featured all Project regulars except Woolfson, present behind the scenes, while Parsons stayed at the mixer except for the last song, when he played acoustic guitar.
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Since 1993, Alan Parsons continues to perform live as the Alan Parsons Live Project to be distinct from the Alan Parsons Project. The current line up consists of lead singer P.J. Olsson, guitarist Jeffrey Kollman, drummer Danny Thompson, keyboardist Tom Brooks, bass guitarist Guy Erez, vocalist and saxophonist Todd Cooper, and guitarist and vocalist Dan Tracey. In 2013, Alan Parsons Live Project played in Colombia with a full choir and orchestra (the Medellin Philharmonic) as 'Alan Parsons Symphonic Project'. A 2-CD live set and a DVD version of this concert were released in May 2016.
In popular culture.
In "" (1999), Dr. Evil devised a plan to turn the moon into a "Death Star" using a "laser" invented by Dr. Alan Parsons. He called this "The Alan Parsons Project".
The opening theme song for the Chicago Bulls has been the song "Sirius" since 1984.
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Almost all
In mathematics, the term "almost all" means "all but a negligible quantity". More precisely, if formula_1 is a set, "almost all elements of formula_1" means "all elements of formula_1 but those in a negligible subset of formula_1". The meaning of "negligible" depends on the mathematical context; for instance, it can mean finite, countable, or null.
In contrast, "almost no" means "a negligible quantity"; that is, "almost no elements of formula_1" means "a negligible quantity of elements of formula_1".
Meanings in different areas of mathematics.
Prevalent meaning.
Throughout mathematics, "almost all" is sometimes used to mean "all (elements of an infinite set) except for finitely many". This use occurs in philosophy as well. Similarly, "almost all" can mean "all (elements of an uncountable set) except for countably many".
Examples:
Meaning in measure theory.
When speaking about the reals, sometimes "almost all" can mean "all reals except for a null set". Similarly, if S is some set of reals, "almost all numbers in S" can mean "all numbers in S except for those in a null set". The real line can be thought of as a one-dimensional Euclidean space. In the more general case of an n-dimensional space (where n is a positive integer), these definitions can be generalised to "all points except for those in a null set" or "all points in S except for those in a null set" (this time, S is a set of points in the space). Even more generally, "almost all" is sometimes used in the sense of "almost everywhere" in measure theory, or in the closely related sense of "almost surely" in probability theory.
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Examples:
Meaning in number theory.
In number theory, "almost all positive integers" can mean "the positive integers in a set whose natural density is 1". That is, if A is a set of positive integers, and if the proportion of positive integers in "A" below n (out of all positive integers below n) tends to 1 as n tends to infinity, then almost all positive integers are in A.
More generally, let S be an infinite set of positive integers, such as the set of even positive numbers or the set of primes, if A is a subset of S, and if the proportion of elements of S below n that are in A (out of all elements of S below n) tends to 1 as n tends to infinity, then it can be said that almost all elements of S are in A.
Examples:
Meaning in graph theory.
In graph theory, if A is a set of (finite labelled) graphs, it can be said to contain almost all graphs, if the proportion of graphs with n vertices that are in A tends to 1 as n tends to infinity. However, it is sometimes easier to work with probabilities, so the definition is reformulated as follows. The proportion of graphs with n vertices that are in A equals the probability that a random graph with n vertices (chosen with the uniform distribution) is in A, and choosing a graph in this way has the same outcome as generating a graph by flipping a coin for each pair of vertices to decide whether to connect them. Therefore, equivalently to the preceding definition, the set "A" contains almost all graphs if the probability that a coin-flip–generated graph with n vertices is in A tends to 1 as n tends to infinity. Sometimes, the latter definition is modified so that the graph is chosen randomly in some other way, where not all graphs with n vertices have the same probability, and those modified definitions are not always equivalent to the main one.
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The use of the term "almost all" in graph theory is not standard; the term "asymptotically almost surely" is more commonly used for this concept.
Example:
Meaning in topology.
In topology and especially dynamical systems theory (including applications in economics), "almost all" of a topological space's points can mean "all of the space's points except for those in a meagre set". Some use a more limited definition, where a subset contains almost all of the space's points only if it contains some open dense set.
Example:
Meaning in algebra.
In abstract algebra and mathematical logic, if U is an on a set X, "almost all elements of X" sometimes means "the elements of some "element" of U". For any partition of X into two disjoint sets, one of them will necessarily contain almost all elements of X. It is possible to think of the elements of a filter on X as containing almost all elements of X, even if it isn't an ultrafilter.
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Aromatic compound
Aromatic compounds or arenes are organic compounds "with a chemistry typified by benzene" and "cyclically conjugated."
The word "aromatic" originates from the past grouping of molecules based on odor, before their general chemical properties were understood. The current definition of aromatic compounds does not have any relation to their odor. Aromatic compounds are now defined as cyclic compounds satisfying Hückel's Rule.
Aromatic compounds have the following general properties:
Arenes are typically split into two categories - benzoids, that contain a benzene derivative and follow the benzene ring model, and non-benzoids that contain other aromatic cyclic derivatives. Aromatic compounds are commonly used in organic synthesis and are involved in many reaction types, following both additions and removals, as well as saturation and dearomatization.
Heteroarenes.
Heteroarenes are aromatic compounds, where at least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen, or sulfur. Examples of non-benzene compounds with aromatic properties are furan, a heterocyclic compound with a five-membered ring that includes a single oxygen atom, and pyridine, a heterocyclic compound with a six-membered ring containing one nitrogen atom. Hydrocarbons without an aromatic ring are called aliphatic. Approximately half of compounds known in 2000 are described as aromatic to some extent.
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Applications.
Aromatic compounds are pervasive in nature and industry. Key industrial aromatic hydrocarbons are benzene, toluene, xylene called BTX. Many biomolecules have phenyl groups including the so-called aromatic amino acids.
Benzene ring model.
Benzene, C6H6, is the least complex aromatic hydrocarbon, and it was the first one defined as such. Its bonding nature was first recognized independently by Joseph Loschmidt and August Kekulé in the 19th century. Each carbon atom in the hexagonal cycle has four electrons to share. One electron forms a sigma bond with the hydrogen atom, and one is used in covalently bonding to each of the two neighboring carbons. This leaves six electrons, shared equally around the ring in delocalized pi molecular orbitals the size of the ring itself. This represents the equivalent nature of the six carbon-carbon bonds all of bond order 1.5. This equivalency can also explained by resonance forms. The electrons are visualized as floating above and below the ring, with the electromagnetic fields they generate acting to keep the ring flat.
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The circle symbol for aromaticity was introduced by Sir Robert Robinson and his student James Armit in 1925 and popularized starting in 1959 by the Morrison & Boyd textbook on organic chemistry. The proper use of the symbol is debated: some publications use it to "any" cyclic π system, while others use it only for those π systems that obey Hückel's rule. Some argue that, in order to stay in line with Robinson's originally intended proposal, the use of the circle symbol should be limited to monocyclic 6 π-electron systems. In this way the circle symbol for a six-center six-electron bond can be compared to the Y symbol for a three-center two-electron bond.
Benzene and derivatives of benzene.
Benzene derivatives have from one to six substituents attached to the central benzene core. Examples of benzene compounds with just one substituent are phenol, which carries a hydroxyl group, and toluene with a methyl group. When there is more than one substituent present on the ring, their spatial relationship becomes important for which the arene substitution patterns "ortho", "meta", and "para" are devised. When reacting to form more complex benzene derivatives, the substituents on a benzene ring can be described as either activated or deactivated, which are electron donating and electron withdrawing respectively. Activators are known as ortho-para directors, and deactivators are known as meta directors. Upon reacting, substituents will be added at the ortho, para or meta positions, depending on the directivity of the current substituents to make more complex benzene derivatives, often with several isomers. Electron flow leading to re-aromatization is key in ensuring the stability of such products.
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For example, three isomers exist for cresol because the methyl group and the hydroxyl group (both ortho para directors) can be placed next to each other ("ortho"), one position removed from each other ("meta"), or two positions removed from each other ("para"). Given that both the methyl and hydroxyl group are ortho-para directors, the ortho and para isomers are typically favoured. Xylenol has two methyl groups in addition to the hydroxyl group, and, for this structure, 6 isomers exist.
Arene rings can stabilize charges, as seen in, for example, phenol (C6H5–OH), which is acidic at the hydroxyl (OH), as charge on the oxygen (alkoxide –O−) is partially delocalized into the benzene ring.
Non-benzylic arenes.
Although benzylic arenes are common, non-benzylic compounds are also exceedingly important. Any compound containing a cyclic portion that conforms to Hückel's rule and is not a benzene derivative can be considered a non-benzylic aromatic compound.
Monocyclic arenes.
Of annulenes larger than benzene, [12]annulene and [14]annulene are weakly aromatic compounds and [18]annulene, Cyclooctadecanonaene, is aromatic, though strain within the structure causes a slight deviation from the precisely planar structure necessary for aromatic categorization. Another example of a non-benzylic monocyclic arene is the cyclopropenyl (cyclopropenium cation), which satisfies Hückel's rule with an n equal to 0. Note, only the cationic form of this cyclic propenyl is aromatic, given that neutrality in this compound would violate either the octet rule or Hückel's rule.
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Other non-benzylic monocyclic arenes include the aforementioned heteroarenes that can replace carbon atoms with other heteroatoms such as N, O or S. Common examples of these are the five-membered pyrrole and six-membered pyridine, both of which have a substituted nitrogen
Polycyclic aromatic hydrocarbons.
Polycyclic aromatic hydrocarbons, also known as polynuclear aromatic compounds (PAHs) are aromatic hydrocarbons that consist of fused aromatic rings and do not contain heteroatoms or carry substituents. Naphthalene is the simplest example of a PAH. PAHs occur in oil, coal, and tar deposits, and are produced as byproducts of fuel burning (whether fossil fuel or biomass). As pollutants, they are of concern because some compounds have been identified as carcinogenic, mutagenic, and teratogenic. PAHs are also found in cooked foods. Studies have shown that high levels of PAHs are found, for example, in meat cooked at high temperatures such as grilling or barbecuing, and in smoked fish. They are also a good candidate molecule to act as a basis for the earliest forms of life. In graphene the PAH motif is extended to large 2D sheets.
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Reactions.
Aromatic ring systems participate in many organic reactions.
Substitution.
In aromatic substitution, one substituent on the arene ring, usually hydrogen, is replaced by another reagent. The two main types are electrophilic aromatic substitution, when the active reagent is an electrophile, and nucleophilic aromatic substitution, when the reagent is a nucleophile. In radical-nucleophilic aromatic substitution, the active reagent is a radical.
An example of electrophilic aromatic substitution is the nitration of salicylic acid, where a nitro group is added para to the hydroxide substituent:
Nucleophilic aromatic substitution involves displacement of a leaving group, such as a halide, on an aromatic ring. Aromatic rings usually nucleophilic, but in the presence of electron-withdrawing groups aromatic compounds undergo nucleophilic substitution. Mechanistically, this reaction differs from a common SN2 reaction, because it occurs at a trigonal carbon atom (sp2 hybridization).
Hydrogenation.
Hydrogenation of arenes create saturated rings. The compound 1-naphthol is completely reduced to a mixture of decalin-ol isomers.
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The compound resorcinol, hydrogenated with Raney nickel in presence of aqueous sodium hydroxide forms an enolate which is alkylated with methyl iodide to 2-methyl-1,3-cyclohexandione:
Dearomatization.
In dearomatization reactions the aromaticity of the reactant is lost. In this regard, the dearomatization is related to hydrogenation. A classic approach is Birch reduction. The methodology is used in synthesis.
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Abbey
An abbey is a type of monastery used by members of a religious order under the governance of an abbot or abbess. Abbeys provide a complex of buildings and land for religious activities, work, and housing of Christian monks and nuns.
The concept of the abbey has developed over many centuries from the early monastic ways of religious men and women where they would live isolated from the lay community about them. Religious life in an abbey may be monastic. An abbey may be the home of an enclosed religious order or may be open to visitors. The layout of the church and associated buildings of an abbey often follows a set plan determined by the founding religious order.
Abbeys are often self-sufficient while using any abundance of produce or skill to provide care to the poor and needy, refuge to the persecuted, or education to the young. Some abbeys offer accommodation to people who are seeking spiritual retreat. There are many famous abbeys across the Mediterranean Basin and Europe.
Monastic origins of the abbey.
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Ascetics and anchorites.
The earliest known Christian monasteries were groups of huts built near the residence of a famous ascetic or other holy person. Disciples wished to be close to their holy man or woman in order to study their doctrine or imitate their way of life.
In the earliest times of Christian monasticism, ascetics would live in social isolation but near a village church. They would subsist whilst donating any excess produce to the poor. However, increasing religious fervor about the ascetic's ways and or persecution of them would drive them further away from their community and further into solitude. For instance, the cells and huts of anchorites (religious recluses) have been found in the deserts of Egypt.
In 312 AD, Anthony the Great retired to the Thebaid region of Egypt to escape the persecution of the Emperor Maximian. Anthony was the best known of the anchorites of his time due to his degree of austerity, sanctity and his powers of exorcism. The deeper he withdrew into the wilderness, the more numerous his disciples became. They refused to be separated from him and built their cells close to him. This became a first true monastic community. According to August Neander, Anthony inadvertently became the founder of a new mode of living in common, Coenobitism.
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Laurae and Coenobia.
At Tabennae on the Nile, in Upper Egypt, Saint Pachomius laid the foundations for the coenobitical life by arranging everything in an organized manner. He built several monasteries, each with about 1,600 separate cells laid out in lines. These cells formed an encampment where the monks slept and performed some of their manual tasks. There were nearby large halls such as the church, refectory, kitchen, infirmary, and guest house for the monk's common needs. An enclosure protecting all these buildings gave the settlement the appearance of a walled village. This layout, known as the "laurae" (lanes), became popular throughout Israel.
As well as the "laurae", communities known as "caenobia" developed. These were monasteries where monks lived a common life together. The monks were not permitted to retire to the cells of a laurae before they had undergone a lengthy period of training. In time, this form of common life superseded that of the older laurae.
In the late 300s AD, Palladius visited the Egyptian monasteries. He described three hundred members of the coenobium of Panopolis. There were fifteen tailors, seven smiths, four carpenters, twelve camel-drivers and fifteen tanners. These people were divided into subgroups, each with its own "oeconomus". A chief steward was at the head of the monastery.
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The produce of the monastery was brought to Alexandria for sale. The moneys raised were used to purchase stores for the monastery or were given away as charity. Twice in the year, the superiors of several coenobia met at the chief monastery, under the presidency of an "archimandrite" (the "chief of the fold" from the word, "miandra" (a sheepfold)) in order to make their reports. Chrysostom recorded the workings of a coenobia in the vicinity of Antioch in Syria. The monks lived in separate huts ("kalbbia") which formed a religious hamlet on the mountainside. They were subject to an abbot, and observed a common rule.
Great Lavra, Mount Athos.
The layout of the monastic coenobium was influenced by a number of factors. These included a need for defence, economy of space, and convenience of access. The layout of buildings became compact and orderly. Larger buildings were erected and defence was provided by strong outside walls. Within the walls, the buildings were arranged around one or more open courts surrounded by cloisters. The usual arrangement for monasteries of the Eastern world is exemplified in the plan of the convent of the Great Lavra at Mount Athos.
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With reference to the diagram, right, the convent of the Great Lavra is enclosed within a strong and lofty blank stone wall. The area within the wall is between three and four acres (12,000 and 16,000 m2). The longer side is about in length. There is only one entrance, which is located on the north side (A), defended by three iron doors. Near the entrance is a large tower (M), a constant feature in the monasteries of the Levant (Eastern Mediterranean area). There is a small postern gate at L.
The enceinte comprises two large open courts, surrounded with buildings connected with cloister galleries of wood or stone. The outer court, which is the larger by far, contains the granaries and storehouses (K), the kitchen (H) and other offices connected with the refectory (G). Immediately adjacent to the gateway is a two-storied guest-house, entered from a cloister (C). The inner court is surrounded by a cloister (EE) from which one enters the monks' cells (II).
In the centre of this court stands the katholikon or conventual church, a square building with an apse of the cruciform domical Byzantine type, approached by a domed narthex. In front of the church stands a marble fountain (F), covered by a dome supported on columns.
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Opening from the western side of the cloister, but actually standing in the outer court, is the refectory (G), a large cruciform (cross shaped) building, about square, decorated within with frescoes of saints. At the upper end is a semicircular recess, similar to the triclinium of the Lateran Palace in Rome, in which is placed the seat of the hegumenos or abbot. This apartment is chiefly used as a meeting place, with the monks usually taking their meals in their separate cells.
Adoption of the Roman villa plan.
Monasticism in the West began with the activities of Benedict of Nursia (born 480 AD). Near Nursia, a town in Perugia, Italy, a first abbey was established at Monte Cassino (529 AD). Between 520 and 700 AD, monasteries were built which were spacious and splendid. All the city states of Italy hosted a Benedictine convent as did the cities of England, France and Spain. By 1415 AD, the time of the Council of Constance, 15,070 Benedictine monasteries had been established.
The early Benedictine monasteries, including the first at Monte Cassino, were constructed on the plan of the Roman villa. The layout of the Roman villa was quite consistent throughout the Roman Empire and where possible, the monks reused available villas in sound repair. This was done at Monte Cassino.
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However, over time, changes to the common villa lay out occurred. The monks required buildings which suited their religious and day-to-day activities. No overriding specification was demanded of the monks but the similarity of their needs resulted in uniformity of design of abbeys across Europe. Eventually, the buildings of a Benedictine abbey were built in a uniform lay out, modified where necessary, to accommodate local circumstances.
Abbey of St Gall.
The plan of the Abbey of Saint Gall (719 AD) in what is now Switzerland indicates the general arrangement of a Benedictine monastery of its day. According to the architect Robert Willis (architect) (1800–1875) the Abbey's lay out is that of a town of individual houses with streets running between them. The abbey was planned in compliance with the Benedictine rule that, if possible, a monastery should be self-contained. For instance, there was a mill, a bakehouse, stables, and cattle stalls. In all, there were thirty-three separate structures; mostly one level wooden buildings.
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The Abbey church occupied the centre of a quadrangular area, about square. On the eastern side of the north transept of the church was the "scriptorium" or writing-room, with a library above.
The church and nearby buildings ranged about the cloister, a court about which there was a covered arcade which allowed sheltered movement between the buildings. The nave of the church was on the north boundary of the cloister.
On the east side of the cloister, on the ground floor, was the "pisalis" or "calefactory". This was a common room, warmed by flues beneath the floor. Above the common room was the dormitory. The dormitory opened onto the cloister and also onto the south transept of the church. This enabled the monks to attend nocturnal services. A passage at the other end of the dormitory lead to the "necessarium" (latrines).
On the south side of the cloister was the refectory. The kitchen, at the west end of the refectory was accessed via an anteroom and a long passage. Nearby were the bake house, brew house and the sleeping-rooms of the servants. The upper story of the refectory was called the "vestiarium" (a room where the ordinary clothes of the monks were stored).
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On the western side of the cloister was another two-story building with a cellar on the ground floor and the larder and store-room on the upper floor. Between this building and the church was a parlour for receiving visitors. One door of the parlour led to the cloisters and the other led to the outer part of the Abbey.
Against the outer wall of the church was a school and headmaster's house. The school consisted of a large schoolroom divided in the middle by a screen or partition, and surrounded by fourteen little rooms, the "dwellings of the scholars". The abbot's home was near the school.
To the north of the church and to the right of the main entrance to the Abbey, was a residence for distinguished guests. To the left of the main entrance was a building to house poor travellers and pilgrims. There was also a building to receive visiting monks. These "hospitia" had a large common room or refectory surrounded by bed rooms. Each hospitium had its own brewhouse and bakehouse, and the building for more prestigious travellers had a kitchen and storeroom, with bedrooms for the guests' servants and stables for their horses. The monks of the Abbey lived in a house built against the north wall of the church.
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The whole of the southern and western areas of the Abbey were devoted to workshops, stables and farm-buildings including stables, ox-sheds, goatstables, piggeries, and sheep-folds, as well as the servants' and labourers' quarters.
In the eastern part of the Abbey there was a group of buildings representing in layout, two complete miniature monasteries. That is, each had a covered cloister surrounded by the usual buildings such as the church, the refectory, the dormitory and so on. A detached building belonging to each contained a bathroom and a kitchen.
One of the miniature complexes was called the "oblati". These were the buildings for the novices. The other complex was a hospital or infirmary for the care of sick monks. This infirmary complex included a physician's residence, a physic garden, a drug store, and a chamber for the critically ill. There was also a room for bloodletting and purging. The physic garden occupied the north east corner of the Abbey.
In the southernmost area of the abbey was the workshop containing utilities for shoemakers, saddlers (or shoemakers, sellarii), cutlers and grinders, trencher-makers, tanners, curriers, fullers, smiths and goldsmiths. The tradesmen's living quarters were at the rear of the workshop. Here, there were also farm buildings, a large granary and threshing-floor, mills, and malthouse. At the south-east corner of the Abbey were hen and duck houses, a poultry-yard, and the dwelling of the keeper. Nearby was the kitchen garden which complemented the physic garden and a cemetery orchard.
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Every large monastery had priories. A priory was a smaller structure or entities which depended on the monastery. Some were small monasteries accommodating five or ten monks. Others were no more than a single building serving as residence or a farm offices. The outlying farming establishments belonging to the monastic foundations were known as "villae" or "granges". They were usually staffed by lay-brothers, sometimes under the supervision of a monk.
Benedictine abbeys in England.
Many of today's cathedrals in England were originally Benedictine monasteries. These included Canterbury, Chester, Durham, Ely, Gloucester, Norwich, Peterborough, Rochester, Winchester, and Worcester. Shrewsbury Abbey in Shropshire was founded as a Benedictine monastery by the Normans in 1083.
Westminster Abbey.
Westminster Abbey was founded in the tenth century by Saint Dunstan who established a community of Benedictine monks. The only traces of St Dunstan's monastery remaining are round arches and massive supporting columns of the undercroft and the Pyx Chamber.
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The cloister and buildings lie directly to the south of the church. Parallel to the nave, on the south side of the cloister, was a refectory, with a lavatory at the door. On the eastern side, there was a dormitory, raised on a vaulted substructure and communicating with the south transept and a chapter house (meeting room). A small cloister lay to the south-east of the large cloister. Beyond that was an infirmary with a table hall and a refectory for those who were able to leave their chambers. At the west entrance to the Abbey, there was a house and a small courtyard for the abbot.
St Mary's Abbey, York.
In 1055, St Mary's Abbey, York was built in England's north by the Order of Saint Benedict. It followed the common plan. The entrance to the abbey was through a strong gate on the northern side. Close to the entrance was a chapel. This was for visitors arriving at the Abbey to make their devotions. Near the gate was the "hospitium" (guest hall). The buildings are completely ruined, but the walls of the nave and the cloisters are still visible on the grounds of the Yorkshire Museum.
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The Abbey was surrounded by fortified walls on three sides. The River Ouse bordered the fourth side. The stone walls remain as an excellent example of English abbey walls.
Reforms at the Abbey of Cluny.
The Abbey of Cluny was founded by William I, Duke of Aquitaine in 910 AD at Cluny, Saône-et-Loire, France. The Abbey was built in the Romanesque style. The Abbey was noted for its strict observance of the Rule of Saint Benedict. However, reforms resulted in many departures from this precedent. The Cluniac Reforms brought focus to the traditions of monastic life, encouraging art and the caring of the poor. The reforms quickly spread by the founding of new abbey complexes and by adoption of the reforms by existing abbeys. By the twelfth century, the Abbey of Cluny was the head of an order consisting of 314 monasteries.
The church at the Abbey was commenced in 1089 AD by Hugh of Cluny, the sixth abbot. It was finished and consecrated by Pope Innocent II around 1132 AD. The church was regarded as one of the wonders of the Middle Ages. At in length, it was the largest church in Christendom until the completion of St Peter's Basilica at Rome. The church consisted of five naves, a narthex (ante-church) which was added in 1220 AD, and several towers. Together with the conventual buildings, it covered an area of twenty-five acres.
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In the Dechristianization of France during the French Revolution in 1790 AD, the Abbey church was bought by the town and almost entirely destroyed. As of 2025, however, fragments of the original Abbey still stand and archaeological excavations have intermittently been conducted over the past century, yielding a massively important and rich source of information.
English Cluniac houses.
The first English house of the Cluniac order was built at Lewes, Sussex. It was founded by William de Warenne, 1st Earl of Surrey in about 1077 AD. All but one of the Cluniac houses in Britain were known as priories, symbolizing their subordination to the Abbot of Cluny. All the Cluniac houses in England and Scotland were French colonies, governed by French priors who travelled to the Abbey of Cluny to consult or be consulted (unless the abbot of Cluny chose to come to Britain, which happened rarely). The priory at Paisley was an exception. In 1245 AD it was raised to the status of an abbey, answerable only to the Pope.
Abbeys of the Augustinian Canons.
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The Augustinian (or "Austin") canons were an order of regular clergy within the hierarchy of the Catholic church. They held a position between monks and secular canons. They were known as "Black canons" because of the colour of their habits. In 1105 AD, the first house of the order was established at St Botolph's Priory, Colchester, Essex.
The canons built very long naves to accommodate large congregations. The choirs were also long. Sometimes, as at Llanthony Priory and Christchurch, Dorset (Twynham), the choir was closed from the aisles. At other abbeys of the order, such as Bolton Abbey or Kirkham Priory, there were no aisles. The nave in the northern houses of the order often had only a north aisle (this is the case at Bolton, Brinkburn Priory and Lanercost Priory). The arrangement of the monastic buildings followed the ordinary plan. The prior's lodge was usually attached to the southwest angle of the nave.
The Austin canons' house at Thornton, Lincolnshire had a large and magnificent gatehouse. The upper floors of the gatehouse formed the guest-house. The chapter-house was octagonal in shape.
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Augustinian abbeys.
Premonstratensians (Norbertians).
The Premonstratensian regular canons, or "White canons", were of an order founded in 1119 AD by Norbert of Xanten. The order was a reformed branch of the Augustinian canons. From a marshy area in the Forest of Coucy in the diocese of Laon, the order spread widely. Even in Norbert's lifetime, the order had built abbeys in Aleppo, Syria, and in the Kingdom of Jerusalem. Of the Abbey of Saint Samuel, Denys Pringle wrote, "The Premonstatensian abbey of Saint Samuel was a daughter house of Prémontré itself. Its abbot had the status of a suffragan of the patriarch of Jerusalem, with the right to a cross, but not to a mitre nor a ring." It long maintained its rigid austerity, though in later years the abbey grew wealthier, and its members indulged in more frequent luxuries.
Just after 1140 AD, the Premonstratensians were brought to England. Their first settlement was at Newhouse Abbey, Lincolnshire, near the Humber tidal estuary. There were as many as thirty-five Premonstratensian abbeys in England. The head abbey in England was at Welbeck Abbey but the best preserved are Easby Abbey in Yorkshire, and Bayham Old Abbey in Kent.
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The layout of Easby Abbey is irregular due to its position on the edge of a steep river bank. The cloister is duly placed on the south side of the church, and the chief buildings occupy their usual positions around it. However, the cloister garth (quadrangle), as at Chichester, is not rectangular, and thus, all the surrounding buildings are positioned in an awkward fashion. The church follows the plan adopted by the Austin canons in their northern abbeys, and has only one aisle to the north of the nave, while the choir is long, narrow and without an aisle. Each transept has an aisle to the east, forming three chapels.
The church at Bayham Old Abbey had no aisles in the nave or the choir. The latter terminated in a three-sided apse. The church is remarkable for its extreme narrowness in proportion to its length. While the building is long, it is not more than wide. Premonstratensian canons did not care to have congregations nor possessions. Therefore, they built their churches in the shape of a long room.
Cistercian abbeys.
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The Cistercians, a Benedictine reform group, were established at Cîteaux in 1098 AD by Robert of Molesme, Abbot of Molesme, for the purpose of restoring, as far as possible, the literal observance of the Rule of Saint Benedict. La Ferté, Pontigny, Clairvaux, and Morimond were the first four abbeys to follow Cîteaux's example and others followed. The monks of Cîteaux created the well known vineyards of Clos-Vougeot and Romanée in Burgundy.
The Cistercian principle of rigid self-abnegation carried over to the design of the order's churches and buildings. The defining architectural characteristic of the Cistercian abbeys was extreme simplicity and plainness. Only a single, central tower was permitted, and that was usually very low. Unnecessary pinnacles and turrets were prohibited. The triforium was omitted. The windows were usually plain and undivided, and it was forbidden to decorate them with stained glass. All needless ornament was proscribed. The crosses were made of wood and the candlesticks of iron.
The same principle governed the choice of site for Cistercian abbeys in that a most dismal site might be improved by the building of an abbey. The Cistercian monasteries were founded in deep, well-watered valleys, always standing at a stream's edge. The building might extend over the water as is the case at Fountains Abbey. These valleys, now rich and productive, had a very different appearance when the brethren first chose them as their place of retreat. Wide swamps, deep morasses, tangled thickets, and wild, impassable forests were their prevailing features. Clara Vallis of St Bernard, now the "bright valley" was originally, the "Valley of Wormwood". It was an infamous den of robbers.
Copts.
The plan of a Coptic Orthodox monastery, from Lenoir, shows a church of three aisles, with cellular apses, and two ranges of cells on either side of an oblong gallery.
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Annales school
The "Annales" school () is a group of historians associated with a style of historiography developed by French historians in the 20th century to stress long-term social history. It is named after its scholarly journal "Annales. Histoire, Sciences Sociales", which remains the main source of scholarship, along with many books and monographs. The school has been influential in setting the agenda for historiography in France and numerous other countries, especially regarding the use of social scientific methods by historians, emphasizing social and economic rather than political or diplomatic themes.
The school deals primarily with late medieval and early modern Europe (before the French Revolution), with little interest in later topics. It has dominated French social history and heavily influenced historiography in Europe and Latin America. Prominent leaders include co-founders Lucien Febvre (1878–1956), Henri Hauser (1866–1946) and Marc Bloch (1886–1944). The second generation was led by Fernand Braudel (1902–1985) and included Georges Duby (1919–1996), Pierre Goubert (1915–2012), Robert Mandrou (1921–1984), Pierre Chaunu (1923–2009), Jacques Le Goff (1924–2014), and Ernest Labrousse (1895–1988). Institutionally it is based on the "Annales" journal, the SEVPEN publishing house, the (FMSH), and especially the 6th Section of the École pratique des hautes études, all based in Paris. A third generation was led by Emmanuel Le Roy Ladurie (1929–2023) and includes Jacques Revel, and Philippe Ariès (1914–1984), who joined the group in 1978. The third generation stressed history from the point of view of mentalities, or . The fourth generation of "Annales" historians, led by Roger Chartier (born 1945), clearly distanced itself from the approach, replaced by the cultural and linguistic turn, which emphasizes the social history of cultural practices.
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The main scholarly outlet has been the journal ("Annals of Economic and Social History"), founded in 1929 by Lucien Febvre and Marc Bloch, which broke radically with traditional historiography by insisting on the importance of taking all levels of society into consideration and emphasized the collective nature of mentalities. Its contributors viewed events as less fundamental than the mental frameworks that shaped decisions and practices. However, informal successor as head of the school was Le Roy Ladurie. Multiple responses were attempted by the school. Scholars moved in multiple directions, covering in disconnected fashion the social, economic, and cultural history of different eras and different parts of the globe. By the time of the crisis the school was building a vast publishing and research network reaching across France, Europe, and the rest of the world. Influence spread out from Paris, but few new ideas came in. Much emphasis was given to quantitative data, seen as the key to unlocking all of social history. However, the "Annales" ignored the developments in quantitative studies underway in the U.S. and Britain, which reshaped economic, political, and demographic research. An attempt to require an "Annales"-written textbook for French schools was rejected by the government. By 1980 postmodern sensibilities undercut confidence in overarching metanarratives. As Jacques Revel notes, the success of the "Annales" school, especially its use of social structures as explanatory forces, contained the seeds of its own downfall, for there is "no longer any implicit consensus on which to base the unity of the social, identified with the real". The "Annales" school kept its infrastructure, but lost its .
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The journal.
The journal began in Strasbourg as ; it moved to Paris and kept the same name from 1929 to 1939. It was successively renamed (1939–1942, 1945), (1942–1944), (1946–1994), and (1994– ).
In 1962, Braudel and Gaston Berger used Ford Foundation money and government funds to create a new independent foundation, the (FMSH), which Braudel directed from 1970 until his death. In 1970, the 6th Section and the "Annales" relocated to the FMSH building. FMSH set up elaborate international networks to spread the "Annales" gospel across Europe and the world. In 2013, it began publication of an English language edition, with all the articles translated.
The scope of topics covered by the journal is vast and experimental—there is a search for total history and new approaches. The emphasis is on social history, and very long-term trends, often using quantification and paying special attention to geography and to the intellectual world view of common people, or "mentality" (). Little attention is paid to political, diplomatic, or military history, or to biographies of famous men. Instead the "Annales" focused attention on the synthesizing of historical patterns identified from social, economic, and cultural history, statistics, medical reports, family studies, and even psychoanalysis.
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Origins.
The "Annales" was founded and edited by Marc Bloch and Lucien Febvre in 1929, while they were teaching at the University of Strasbourg and later in Paris. These authors, the former a medieval historian and the latter an early modernist, quickly became associated with the distinctive "Annales" approach, which combined geography, history, and the sociological approaches of the (many members of which were their colleagues at Strasbourg) to produce an approach which rejected the predominant emphasis on politics, diplomacy and war of many 19th and early 20th-century historians as spearheaded by historians whom Febvre called Les Sorbonnistes. Instead, they pioneered an approach to a study of long-term historical structures () over events and political transformations. Geography, material culture, and what later Annalistes called , or the psychology of the epoch, are also characteristic areas of study. The goal of the Annales was to undo the work of the Sorbonnistes, to turn French historians away from the narrowly political and diplomatic toward the new vistas in social and economic history.
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Co-founder Marc Bloch (1886–1944) was a quintessential modernist who studied at the elite École Normale Supérieure, and in Germany, serving as a professor at the University of Strasbourg until he was called to the Sorbonne in Paris in 1936 as professor of economic history. Bloch's interests were highly interdisciplinary, influenced by the geography of Paul Vidal de la Blache (1845–1918) and the sociology of Émile Durkheim (1858–1917). His own ideas, especially those expressed in his masterworks, "French Rural History" (, 1931) and "Feudal Society", were incorporated by the second-generation Annalistes, led by Fernand Braudel.
Precepts.
Georges Duby, a leader of the school, wrote that the history he taught:
The Annalistes, especially Lucien Febvre, advocated a , or , a complete study of a historic problem.
Postwar.
Bloch was shot by the Gestapo during the German occupation of France in World War II for his active membership of the French Resistance, and Febvre carried on the "Annales" approach in the 1940s and 1950s. It was during this time that he mentored Braudel, who would become one of the best-known exponents of this school. Braudel's work came to define a "second" era of "Annales" historiography and was influential throughout the 1960s and 1970s, especially for his work on the Mediterranean region in the era of Philip II of Spain.
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Braudel developed the idea, often associated with Annalistes, of different modes of historical time: (the quasi motionless history) of historical geography, the history of social, political and economic structures (), and the history of men and events, in the context of their structures.
While authors such as Emmanuel Le Roy Ladurie, Marc Ferro and Jacques Le Goff continue to carry the "Annales" banner, today the "Annales" approach has been less distinctive as more and more historians do work in cultural history, political history and economic history.
Bloch's (1924) looked at the long-standing folk belief that the king could cure scrofula by his thaumaturgic touch. The kings of France and England indeed regularly practiced the ritual. Bloch was not concerned with the effectiveness of the royal touch—he acted instead like an anthropologist in asking why people believed it and how it shaped relations between king and commoner. The book was highly influential in introducing comparative studies (in this case France and England), as well as long durations ("longue durée") studies spanning several centuries, even up to a thousand years, downplaying short-term events. Bloch's revolutionary charting of mentalities, or , resonated with scholars who were reading Freud and Proust. In the 1960s, Robert Mandrou and Georges Duby harmonized the concept of history with Fernand Braudel's structures of historical time and linked mentalities with changing social conditions. A flood of studies based on these approaches appeared during the 1970s and 1980s. By the 1990s, however, history had become interdisciplinary to the point of fragmentation, but still lacked a solid theoretical basis. While not explicitly rejecting history, younger historians increasingly turned to other approaches.
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Braudel.
Fernand Braudel became the leader of the second generation after 1945. He obtained funding from the Rockefeller Foundation in New York and founded the 6th Section of the Ecole Pratique des Hautes Etudes, which was devoted to the study of history and the social sciences. It became an independent degree-granting institution in 1975 under the name École des Hautes Études en Sciences Sociales (EHESS). Braudel's followers admired his use of the approach to stress slow, and often imperceptible effects of space, climate and technology on the actions of human beings in the past. The "Annales" historians, after living through two world wars and incredible political upheavals in France, were deeply uncomfortable with the notion that multiple ruptures and discontinuities created history. They preferred to stress inertia and the longue durée. Special attention was paid to geography, climate, and demography as long-term factors. They believed the continuities of the deepest structures were central to history, beside which upheavals in institutions or the superstructure of social life were of little significance, for history lies beyond the reach of conscious actors, especially the will of revolutionaries. They rejected the Marxist idea that history should be used as a tool to foment and foster revolutions. In turn the Marxists called them conservatives.
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Braudel's first book, (1949) ("The Mediterranean and the Mediterranean World in the Age of Philip II") was his most influential. This vast panoramic view used ideas from other social sciences, employed effectively the technique of the longue durée, and downplayed the importance of specific events and individuals. It stressed geography but not . It was widely admired, but most historians did not try to replicate it and instead focused on their specialized monographs. The book dramatically raised the worldwide profile of the Annales School.
In 1951, historian Bernard Bailyn published a critique of , which he framed as dichotomizing politics and society.
Regionalism.
Before "Annales", French history supposedly happened in Paris. Febvre broke decisively with this paradigm in 1912, with his sweeping doctoral thesis on . The geography and social structure of this region overwhelmed and shaped the king's policies.
The "Annales" historians did not try to replicate Braudel's vast geographical scope in . Instead they focused on regions in France over long stretches of time. The most important was the study of "The Peasants of Languedoc" by Braudel's star pupil and successor Emmanuel Le Roy Ladurie. The regionalist tradition flourished especially in the 1960s and 1970s in the work of Pierre Goubert in 1960 on Beauvais and René Baehrel on Basse-Provence. "Annales" historians in the 1970s and 1980s turned to urban regions, including Pierre Deyon (Amiens), Maurice Garden (Lyon), Jean-Pierre Bardet (Rouen), Georges Freche (Toulouse), Gregory Hanlon (Agen and Layrac), and Jean-Claude Perrot (Caen). By the 1970s the shift was underway from the earlier economic history to cultural history and the history of mentalities.
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Impact outside France.
The "Annales" school systematically reached out to create an impact on other countries. Its success varied widely. The "Annales" approach was especially well received in Italy and Poland. Franciszek Bujak (1875–1953) and Jan Rutkowski (1886–1949), the founders of modern economic history in Poland and of the journal (1931– ), were attracted to the innovations of the Annales school. Rutkowski was in contact with Bloch and others, and published in the "Annales". After the Communists took control in the 1940s Polish scholars were safer working on the Middle Ages and the early modern era rather than contemporary history. After the "Polish October" of 1956 the Sixth Section in Paris welcomed Polish historians and exchanges between the circle of the "Annales" and Polish scholars continued until the early 1980s. The reciprocal influence between the French school and Polish historiography was particularly evident in studies on the Middle Ages and the early modern era studied by Braudel.
In South America the "Annales" approach became popular. From the 1950s Federico Brito Figueroa was the founder of a new Venezuelan historiography based largely on the ideas of the Annales School. Brito Figueroa carried his conception of the field to all levels of university study, emphasizing a systematic and scientific approach to history and placing it squarely in the social sciences. Spanish historiography was influenced by the "Annales School" starting in 1950 with Jaume Vicens Vives (1910–1960). In Mexico, exiled Republican intellectuals extended the Annales approach, particularly from the Center for Historical Studies of El Colegio de México, the leading graduate studies institution of Latin America.
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British historians, apart from a few Marxists, were generally hostile. Academic historians decidedly sided with Geoffrey Elton's "The Practice of History" against Edward Hallett Carr's "What Is History?" One of the few British historians who were sympathetic towards the work of the "Annales" school was Hugh Trevor-Roper. Among American academics, founding figure in American history of technology Lynn White Jr. dedicated his seminal and controversial book "Medieval Technology and Social Change" to "Annales" founder Marc Bloch. Both the American and the "Annales" historians picked up important family reconstitution techniques from French demographer Louis Henry.
The Wageningen school centered on Bernard Slicher van Bath was viewed internationally as a Dutch counterpart of the Annales school, although Slicher van Bath himself vehemently rejected the idea of a quantitative "school" of historiography.
The "Annales" school has been cited as a key influence in the development of World Systems Theory by sociologist Immanuel Wallerstein.
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Current.
The current leader is Roger Chartier, who is Directeur d'Études at the École des Hautes Études en Sciences Sociales in Paris, Professeur in the Collège de France, and Annenberg Visiting professor of history at the University of Pennsylvania. He frequently lectures and teaches in the United States, Spain, Mexico, Brazil and Argentina. His work in Early Modern European History focuses on the history of education, the history of the book and the history of reading. Recently, he has been concerned with the relationship between written culture as a whole and literature (particularly theatrical plays) for France, England and Spain. His work in this specific field (based on the criss-crossing between literary criticism, bibliography, and sociocultural history) is connected to broader historiographical and methodological interests which deal with the relation between history and other disciplines: philosophy, sociology, anthropology.
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Antimatter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge and parity, or going backward in time (see CPT symmetry). Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms. Minuscule numbers of antiparticles can be generated at particle accelerators, but total artificial production has been only a few nanograms. No macroscopic amount of antimatter has ever been assembled due to the extreme cost and difficulty of production and handling. Nonetheless, antimatter is an essential component of widely available applications related to beta decay, such as positron emission tomography, radiation therapy, and industrial imaging.
In theory, a particle and its antiparticle (for example, a proton and an antiproton) have the same mass, but opposite electric charge, and other differences in quantum numbers.
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A collision between any particle and its anti-particle partner leads to their mutual annihilation, giving rise to various proportions of intense photons (gamma rays), neutrinos, and sometimes less-massive particleantiparticle pairs. The majority of the total energy of annihilation emerges in the form of ionizing radiation. If surrounding matter is present, the energy content of this radiation will be absorbed and converted into other forms of energy, such as heat or light. The amount of energy released is usually proportional to the total mass of the collided matter and antimatter, in accordance with the notable mass–energy equivalence equation, .
Antiparticles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom. The nuclei of antihelium have been artificially produced, albeit with difficulty, and are the most complex anti-nuclei so far observed. Physical principles indicate that complex antimatter atomic nuclei are possible, as well as anti-atoms corresponding to the known chemical elements.
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There is strong evidence that the observable universe is composed almost entirely of ordinary matter, as opposed to an equal mixture of matter and antimatter. This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics. The process by which this inequality between matter and antimatter particles is hypothesised to have occurred is called baryogenesis.
Definitions.
Antimatter particles carry the same charge as matter particles, but of opposite sign. That is, an antiproton is negatively charged and an antielectron (positron) is positively charged. Neutrons do not carry a net charge, but their constituent quarks do. Protons and neutrons have a baryon number of +1, while antiprotons and antineutrons have a baryon number of –1. Similarly, electrons have a lepton number of +1, while that of positrons is –1. When a particle and its corresponding antiparticle collide, they are both converted into energy.
The French term for "made of or pertaining to antimatter", , led to the initialism "C.T." and the science fiction term , as used in such novels as "Seetee Ship".
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Conceptual history.
The idea of negative matter appears in past theories of matter that have now been abandoned. Using the once popular vortex theory of gravity, the possibility of matter with negative gravity was discussed by William Hicks in the 1880s. Between the 1880s and the 1890s, Karl Pearson proposed the existence of "squirts" and sinks of the flow of aether. The squirts represented normal matter and the sinks represented negative matter. Pearson's theory required a fourth dimension for the aether to flow from and into.
The term antimatter was first used by Arthur Schuster in two rather whimsical letters to "Nature" in 1898, in which he coined the term. He hypothesized antiatoms, as well as whole antimatter solar systems, and discussed the possibility of matter and antimatter annihilating each other. Schuster's ideas were not a serious theoretical proposal, merely speculation, and like the previous ideas, differed from the modern concept of antimatter in that it possessed negative gravity.
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The Feynman–Stueckelberg interpretation states that antimatter and antiparticles behave exactly identical to regular particles, but traveling backward in time. This concept is nowadays used in modern particle physics, in Feynman diagrams.
Notation.
One way to denote an antiparticle is by adding a bar over the particle's symbol. For example, the proton and antiproton are denoted as and , respectively. The same rule applies if one were to address a particle by its constituent components. A proton is made up of quarks, so an antiproton must therefore be formed from antiquarks. Another convention is to distinguish particles by positive and negative electric charge. Thus, the electron and positron are denoted simply as and respectively. To prevent confusion, however, the two conventions are never mixed.
Properties.
There is no difference in the gravitational behavior of matter and antimatter. In other words, antimatter falls down when dropped, not up. This was confirmed with the thin, very cold gas of thousands of antihydrogen atoms that were confined in a vertical shaft surrounded by superconducting electromagnetic coils. These can create a magnetic bottle to keep the antimatter from coming into contact with matter and annihilating. The researchers then gradually weakened the magnetic fields and detected the antiatoms using two sensors as they escaped and annihilated. Most of the anti-atoms came out of the bottom opening, and only one-quarter out of the top.
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There are compelling theoretical reasons to believe that, aside from the fact that antiparticles have different signs on all charges (such as electric and baryon charges), matter and antimatter have exactly the same properties. This means a particle and its corresponding antiparticle must have identical masses and decay lifetimes (if unstable). It also implies that, for example, a star made up of antimatter (an "antistar") will shine just like an ordinary star. This idea was tested experimentally in 2016 by the ALPHA experiment, which measured the transition between the two lowest energy states of antihydrogen. The results, which are identical to that of hydrogen, confirmed the validity of quantum mechanics for antimatter.
Origin and asymmetry.
Most things observable from the Earth seem to be made of matter rather than antimatter. If antimatter-dominated regions of space existed, the gamma rays produced in annihilation reactions along the boundary between matter and antimatter regions would be detectable.
Antiparticles are created everywhere in the universe where high-energy particle collisions take place. High-energy cosmic rays striking Earth's atmosphere (or any other matter in the Solar System) produce minute quantities of antiparticles in the resulting particle jets, which are immediately annihilated by contact with nearby matter. They may similarly be produced in regions like the center of the Milky Way and other galaxies, where very energetic celestial events occur (principally the interaction of relativistic jets with the interstellar medium). The presence of the resulting antimatter is detectable by the two gamma rays produced every time positrons annihilate with nearby matter. The frequency and wavelength of the gamma rays indicate that each carries 511 keV of energy (that is, the rest mass of an electron multiplied by "c"2).
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Observations by the European Space Agency's INTEGRAL satellite may explain the origin of a giant antimatter cloud surrounding the Galactic Center. The observations show that the cloud is asymmetrical and matches the pattern of X-ray binaries (binary star systems containing black holes or neutron stars), mostly on one side of the Galactic Center. While the mechanism is not fully understood, it is likely to involve the production of electron–positron pairs, as ordinary matter gains kinetic energy while falling into a stellar remnant.
Antimatter may exist in relatively large amounts in far-away galaxies due to cosmic inflation in the primordial time of the universe. Antimatter galaxies, if they exist, are expected to have the same chemistry and absorption and emission spectra as normal-matter galaxies, and their astronomical objects would be observationally identical, making them difficult to distinguish. NASA is trying to determine if such galaxies exist by looking for X-ray and gamma ray signatures of annihilation events in colliding superclusters.
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In October 2017, scientists working on the BASE experiment at CERN reported a measurement of the antiproton magnetic moment to a precision of 1.5 parts per billion. It is consistent with the most precise measurement of the proton magnetic moment (also made by BASE in 2014), which supports the hypothesis of CPT symmetry. This measurement represents the first time that a property of antimatter is known more precisely than the equivalent property in matter.
Antimatter quantum interferometry has been first demonstrated in 2018 in the Positron Laboratory (L-NESS) of Rafael Ferragut in Como (Italy), by a group led by Marco Giammarchi.
Natural production.
Positrons are produced naturally in β+ decays of naturally occurring radioactive isotopes (for example, potassium-40) and in interactions of gamma quanta (emitted by radioactive nuclei) with matter. Antineutrinos are another kind of antiparticle created by natural radioactivity (β− decay). Many different kinds of antiparticles are also produced by (and contained in) cosmic rays. In January 2011, research by the American Astronomical Society discovered antimatter (positrons) originating above thunderstorm clouds; positrons are produced in terrestrial gamma ray flashes created by electrons accelerated by strong electric fields in the clouds. Antiprotons have also been found to exist in the Van Allen Belts around the Earth by the PAMELA module.
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Antiparticles are also produced in any environment with a sufficiently high temperature (mean particle energy greater than the pair production threshold). It is hypothesized that during the period of baryogenesis, when the universe was extremely hot and dense, matter and antimatter were continually produced and annihilated. The presence of remaining matter, and absence of detectable remaining antimatter, is called baryon asymmetry. The exact mechanism that produced this asymmetry during baryogenesis remains an unsolved problem. One of the necessary conditions for this asymmetry is the violation of CP symmetry, which has been experimentally observed in the weak interaction.
Recent observations indicate black holes and neutron stars produce vast amounts of positron-electron plasma via the jets.
Observation in cosmic rays.
Satellite experiments have found evidence of positrons and a few antiprotons in primary cosmic rays, amounting to less than 1% of the particles in primary cosmic rays. This antimatter cannot all have been created in the Big Bang, but is instead attributed to have been produced by cyclic processes at high energies. For instance, electron-positron pairs may be formed in pulsars, as a magnetized neutron star rotation cycle shears electron-positron pairs from the star surface. Therein the antimatter forms a wind that crashes upon the ejecta of the progenitor supernovae. This weathering takes place as "the cold, magnetized relativistic wind launched by the star hits the non-relativistically expanding ejecta, a shock wave system forms in the impact: the outer one propagates in the ejecta, while a reverse shock propagates back towards the star." The former ejection of matter in the outer shock wave and the latter production of antimatter in the reverse shock wave are steps in a space weather cycle.
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Preliminary results from the presently operating Alpha Magnetic Spectrometer ("AMS-02") on board the International Space Station show that positrons in the cosmic rays arrive with no directionality, and with energies that range from 10 GeV to 250 GeV. In September, 2014, new results with almost twice as much data were presented in a talk at CERN and published in Physical Review Letters. A new measurement of positron fraction up to 500 GeV was reported, showing that positron fraction peaks at a maximum of about 16% of total electron+positron events, around an energy of 275 ± 32 GeV. At higher energies, up to 500 GeV, the ratio of positrons to electrons begins to fall again. The absolute flux of positrons also begins to fall before 500 GeV, but peaks at energies far higher than electron energies, which peak about 10 GeV. These results on interpretation have been suggested to be due to positron production in annihilation events of massive dark matter particles.
Cosmic ray antiprotons also have a much higher energy than their normal-matter counterparts (protons). They arrive at Earth with a characteristic energy maximum of 2 GeV, indicating their production in a fundamentally different process from cosmic ray protons, which on average have only one-sixth of the energy.
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There is an ongoing search for larger antimatter nuclei, such as antihelium nuclei (that is, anti-alpha particles), in cosmic rays. The detection of natural antihelium could imply the existence of large antimatter structures such as an antistar. A prototype of the "AMS-02" designated "AMS-01", was flown into space aboard the on STS-91 in June 1998. By not detecting any antihelium at all, the "AMS-01" established an upper limit of 1.1×10−6 for the antihelium to helium flux ratio. AMS-02 revealed in December 2016 that it had discovered a few signals consistent with antihelium nuclei amidst several billion helium nuclei. The result remains to be verified, and , the team is trying to rule out contamination.
Artificial production.
Positrons.
Positrons were reported in November 2008 to have been generated by Lawrence Livermore National Laboratory in large numbers. A laser drove electrons through a gold target's nuclei, which caused the incoming electrons to emit energy quanta that decayed into both matter and antimatter. Positrons were detected at a higher rate and in greater density than ever previously detected in a laboratory. Previous experiments made smaller quantities of positrons using lasers and paper-thin targets; newer simulations showed that short bursts of ultra-intense lasers and millimeter-thick gold are a far more effective source.
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In 2023, the production of the first electron-positron beam-plasma was reported by a collaboration led by researchers at University of Oxford working with the High-Radiation to Materials (HRMT) facility at CERN. The beam demonstrated the highest positron yield achieved so far in a laboratory setting. The experiment employed the 440 GeV proton beam, with formula_1 protons, from the Super Proton Synchrotron, and irradiated a particle converter composed of carbon and tantalum. This yielded a total formula_2 electron-positron pairs via a particle shower process. The produced pair beams have a volume that fills multiple Debye spheres and are thus able to sustain collective plasma oscillations.
Antiprotons, antineutrons, and antinuclei.
The existence of the antiproton was experimentally confirmed in 1955 by University of California, Berkeley physicists Emilio Segrè and Owen Chamberlain, for which they were awarded the 1959 Nobel Prize in Physics. An antiproton consists of two up antiquarks and one down antiquark (). The properties of the antiproton that have been measured all match the corresponding properties of the proton, with the exception of the antiproton having opposite electric charge and magnetic moment from the proton. Shortly afterwards, in 1956, the antineutron was discovered in proton–proton collisions at the Bevatron (Lawrence Berkeley National Laboratory) by Bruce Cork and colleagues.
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In addition to antibaryons, anti-nuclei consisting of multiple bound antiprotons and antineutrons have been created. These are typically produced at energies far too high to form antimatter atoms (with bound positrons in place of electrons). In 1965, a group of researchers led by Antonino Zichichi reported production of nuclei of antideuterium at the Proton Synchrotron at CERN. At roughly the same time, observations of antideuterium nuclei were reported by a group of American physicists at the Alternating Gradient Synchrotron at Brookhaven National Laboratory.
Antihydrogen atoms.
In 1995, CERN announced that it had successfully brought into existence nine hot antihydrogen atoms by implementing the SLAC/Fermilab concept during the PS210 experiment. The experiment was performed using the Low Energy Antiproton Ring (LEAR), and was led by Walter Oelert and Mario Macri. Fermilab soon confirmed the CERN findings by producing approximately 100 antihydrogen atoms at their facilities. The antihydrogen atoms created during PS210 and subsequent experiments (at both CERN and Fermilab) were extremely energetic and were not well suited to study. To resolve this hurdle, and to gain a better understanding of antihydrogen, two collaborations were formed in the late 1990s, namely, ATHENA and ATRAP.
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