Question: The Canterbury cap is descended from an ancient headcovering originally worn where?

full_context: Document 1: Pileus (hat): The pileus ( – "pilos", also pilleus or pilleum in Latin) was a brimless, felt cap worn in Ancient Greece and surrounding regions, later also introduced in Ancient Rome. The Greek πιλίδιον ("pilidion") and Latin "pilleolus" were smaller versions, similar to a skullcap.
Document 2: Bonnet (headgear): A bonnet is any of a wide variety of headgear for both sexes—more often female—from the Middle Ages to the present. It is impossible to generalize as to the styles for which the word has been used any more than for the hat and cap, but there is for both sexes a tendency to use the word for styles in soft material and lacking a brim. Yet the term has also been used, for example, for steel helmets. This was from Scotland (in 1505), where the term has long been especially popular. "Bonnet" derives from the same word in French, where it originally indicated a type of material. In the 21st century, only a few kinds of headgear are still called bonnets, most commonly those worn by babies and Scottish soldiers. In addition, bonnets are worn by women as a Christian headcovering in some denominations.
Document 3: Nambawi: A nambawi is a type of traditional Korean winter hat worn by both men and women during the Joseon period for protection against the cold. The other names for it are "pungdengi" and "nani" (literally warming ears). The "nambawi" is also called "ieom" (literally "covering ears") which was worn in the early Joseon period, although it was derived from the cap. It was originally worn by the upper class as a daily hat, but spread to commoners and women in the later period. It was usually worn by middle-aged women and old people as well as by government officers who put it under the "samo" (사모, official hat).
Document 4: Calceus: Calceus, Latin for shoe or boot, was hobnailed footwear secured by laces in ancient Rome. Mulleus calceus were a red or purple shoe worn by the three highest magistrates in Ancient Rome.
Document 5: Šajkača: The šajkača (Serbian Cyrillic: , ] ) is the Serbian national hat or cap. Traditionally worn by men in the Serbian countryside, it is named after Serb river troops known as "šajkaši", who protected the Austrian Empire against the Ottoman Turks in the 18th century. A popular nationalist symbol in Serbia since the beginning of the early 20th century, it is typically black, grey or green in colour and is usually made of soft, homemade cloth. It became widely worn by Serb men during the First Serbian Uprising and was a key component in the uniform of the Serbian military from the beginning of the 19th century until the end of the 20th century. Today, it is mostly worn by elderly men in rural communities.
Document 6: Party hat: A party hat is generally a playful conical hat made with a rolled up piece of thin cardboard, usually with designs printed on the outside and a long string of elastic acting like a chinstrap, going from one side of the cone's bottom to another to secure the cone to the person's head. Its name originates with its use: Party hats are worn most often at birthday parties, especially by the guest of honor, with a significant minority being worn for New Year celebrations. In Britain the hat is made of paper and is the shape of a crown, and is most typically worn during a Christmas dinner. The party hat has its origins in the dunce cap worn by misbehaving or poorly performing schoolchildren from the mid-19th century to the early 20th century, with its festive decoration and society's positive attitude toward the wearer indicating a relaxation, abrogation, or even reversal of certain social norms: During the occasion in question, the wearer is permitted or encouraged to engage, rather than discouraged from engaging, in frivolous and foolish behavior for which the required wearing of the dunce cap would in other situations constitute a punishment.
Document 7: Hat: A hat is a head covering which is worn for various reasons, including protection against weather conditions, ceremonial reasons such as university graduation, religious reasons, safety, or as a fashion accessory. In the past, hats were an indicator of social status. In the military, hats may denote nationality, branch of service, rank or regiment. Police typically wear distinctive hats such as peaked caps or brimmed hats, such as those worn by the Royal Canadian Mounted Police. Some hats have a protective function. As examples, the hard hat protects construction workers' heads from injury by falling objects and a British police Custodian helmet protects the officer's head, a sun hat shades the face and shoulders from the sun, a cowboy hat protects against sun and rain and a Ushanka fur hat with fold-down earflaps keeps the head and ears warm. Some hats are worn for ceremonial purposes, such as the mortarboard, which is worn (or carried) during university graduation ceremonies. Some hats are worn by members of a certain profession, such as the Toque worn by chefs. Some hats have religious functions, such as the mitres worn by Bishops and the turban worn by Sikhs.
Document 8: Canadian military fur wedge cap: The Canadian military fur wedge cap, "envelope busby", or colloquially "The Astrakhan" is a uniform hat worn by the Canadian military and RCMP. The outside of the cap is entirely covered in real (e.g. seal skin or Persian lamb) or synthetic fur and is shaped like a wedge. When not being worn the cap folds flat. The cap is about 8 in high but is normally worn with the apex of the wedge shape depressed back into the interior of the cap to form a longitudinal trough at the crown, reducing the overall height. Often the cap is patterned such that the front of the crown will be slightly higher than the back. On one side of the military style fur wedge cap hangs a flat flap made of cloth or wool that extends from the crown to the bottom of the cap, known as the "bag". The colour of the "bag" was determined by the regimental colours (e.g. the RCMP bag was yellow). The bag is very similar to that worn with the busby. Because of the cap's passing resemblance to the hussar busby author and researcher James J. Boulton dubbed it the envelope busby. Still, whatever influence the busby may have had on its design, the fur wedge cap pattern was "distinctly Canadian"
Document 9: Cap badge: A cap badge, also known as head badge or hat badge, is a badge worn on uniform headgear and distinguishes the wearer's nationality and/or organisation. The wearing of cap badges is a convention commonly found among military and police forces, as well as uniformed civilian groups such as the Boy Scouts, civil defence organisations, ambulance services (e.g. the St. John Ambulance Brigade), customs services, fire services etc.
Document 10: Blond Kouros's Head of the Acropolis: The so-called Blond Kouros's Head of the Acropolis is the head of a lost marble statue of a young man (Kouros or Ephebe sculpture type) of ca 480 BC, in the Acropolis Museum in Athens, Greece The head and part of the pelvis were found in 1923 northeast of the museum site on the Acropolis of Athens. It belongs to the late archaic or early classical period (Severe style). The curly hair points more to the Archaic than the Classical period.
Document 11: Canterbury cap: The Canterbury cap is a square cloth hat with sharp corners found in the Anglican communion, similar to the Counter-Reformation's biretta, the notable exception being that a Canterbury cap has four ridges, compared to the biretta's three. It is also soft and foldable, "Constructed to fold flat when not in use..." whereas the biretta is rigid. The Canterbury cap is the medieval "birettum," descended from the ancient "pileus" headcovering. It is sometimes called the "catercap."
Document 12: Busby: Busby is the English name for the Hungarian "prémes csákó" ("fur shako") or "kucsma", a military head-dress made of fur, originally worn by Hungarian hussars. In its original Hungarian form the busby was a cylindrical fur cap, having a bag of coloured cloth hanging from the top. The end of this bag was attached to the right shoulder as a defence against sabre cuts. In Great Britain busbies are of two kinds: (a) the hussar busby, cylindrical in shape, with a bag; this is worn by hussars and the Royal Horse Artillery; (b) the rifle busby, a folding cap of astrakhan (curly lambswool) formerly worn by rifle regiments, in shape somewhat resembling a Glengarry but taller. Both have straight plumes in the front of the headdress.
Document 13: Wreath (attire): A wreath (Ancient Greek: στέφανος  "stéfanos" , ), for attire purposes, is a headdress made of leaves, grasses, flowers or branches. It is typically worn in festive occasions and on holy days and has a long history and association with ancient pageants and ceremonies. Outside of occasional use, the wreath can also be used as a crown. The wreath most often has an annular geometric construction.
Document 14: Cappello romano: A cappello romano (pl. "cappelli romani"; Italian: "Roman hat ") or saturno (pl. "saturni"; because its appearance is reminiscent of the ringed planet Saturn) is a hat with a wide, circular brim and a rounded crown worn outdoors in some countries by Catholic clergy, when dressed in a cassock. It is made of either beaver fur or felt, and lined in white silk. Unlike many other articles of clerical clothing, it serves no ceremonial purpose, being primarily a practical item. (The galero is a ceremonial wide brim hat no longer usually worn, though on February 19, 2011, Raymond Cardinal Burke became the first cardinal in recent times to wear (for a single photo) the galero.) The cappello romano is not used in liturgical services. Since the general abandonment of the cassock as street dress, it is uncommon even in Rome today, though it was quite popular there and in some other countries with a Catholic majority population from the 17th century until around 1970.
Document 15: Pickelhaube: The Pickelhaube (plural "Pickelhauben"; from the German "Pickel", "point" or "pickaxe", and "Haube", "bonnet", a general word for "headgear"), also Pickelhelm, was a spiked helmet worn in the nineteenth and twentieth centuries by German military, firefighters, and police. Although typically associated with the Prussian army who adopted it in 1842-43,
ground_truth: Ancient Greece