The ''pot-de-fer'' was a primitive

cannon A cannon is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during th ...

made of

iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...

. It was used by the French in the

Hundred Years' War The Hundred Years' War (; 1337–1453) was a conflict between the kingdoms of Kingdom of England, England and Kingdom of France, France and a civil war in France during the Late Middle Ages. It emerged from feudal disputes over the Duchy ...

. The name means "iron pot" in

French French may refer to: * Something of, from, or related to France ** French language, which originated in France ** French people, a nation and ethnic group ** French cuisine, cooking traditions and practices Arts and media * The French (band), ...

. In Italy, ''pots-de-fer'' were known as ''vasi'' or ''vasii'', meaning "pot" or "

vase A vase ( or ) is an open container. It can be made from a number of materials, such as ceramics, glass, non- rusting metals, such as aluminium, brass, bronze, or stainless steel. Even wood has been used to make vases, either by using tree specie ...

Description

Though occasionally made with

cast Cast may refer to: Music * Cast (band), an English alternative rock band * Cast (Mexican band), a progressive Mexican rock band * The Cast, a Scottish musical duo: Mairi Campbell and Dave Francis * ''Cast'', a 2012 album by Trespassers William ...

bronze Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloid ...

, the ''pot-de-fer'' was essentially an iron

bottle A bottle is a narrow-necked container made of an impermeable material (such as glass, plastic or aluminium) in various shapes and sizes that stores and transports liquids. Its mouth, at the bottling line, can be sealed with an internal ...

with a narrow neck. It was loaded with

powder A powder is a dry solid composed of many very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms ''powder'' and ''granular'' are sometimes used to distinguish se ...

and an iron arrow-like bolt, feathered with iron. It is believed that the middle of the bolt was likely wrapped in

leather Leather is a strong, flexible and durable material obtained from the tanning (leather), tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle, sheep, goats, equine animals, buffal ...

for a snug fit, necessary to enhance the

thrust Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction to be applied to that ...

from the gaseous

pressure Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and eve ...

within the cannon. However, this feature is not shown in

manuscript illumination An illuminated manuscript is a formally prepared document where the text is decorated with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers and liturgical books such as psalters and ...

s. The cannon was set off through a small-diameter

touchhole A touch hole, also known as a cannon vent, is a small hole at the rear (breech) portion of the barrel of a muzzleloading gun or cannon. The hole provides external access of an ignition spark into the breech chamber of the barrel (where the com ...

, where a red-hot wire could be thrust to set off an

explosion An explosion is a rapid expansion in volume of a given amount of matter associated with an extreme outward release of energy, usually with the generation of high temperatures and release of high-pressure gases. Explosions may also be generated ...

and fire the cannon.Manucy, Albert, ''Artillery through the Ages: A Short Illustrated History of Cannon'', p. 3 (Washington, United States Government Printing Office, 1949; The Minerva Group, new edition 2001)

Historical uses and mentions

The ''pot-de-fer'' was first depicted in a

manuscript A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten, as opposed to mechanically printed or reproduced in some indirect or automated way. More recently, the term has ...

, ''De officiis regum'' of 1326, by

Walter de Millimete Walter de Milemete was an English scholar who in his early twenties was commissioned by Queen Isabella of France to write a treatise on kingship for her son, the young prince Edward, later king Edward III of England called ''De nobilitatibus, sa ...

, an illuminated manuscript of 1327 that was presented to

Edward III Edward III (13 November 1312 – 21 June 1377), also known as Edward of Windsor before his accession, was King of England from January 1327 until his death in 1377. He is noted for his military success and for restoring royal authority after t ...

upon his accession to the

English throne The Throne of England is the throne of the Monarch of England. "Throne of England" also refers metonymically to the office of monarch, and monarchy itself.Gordon, Delahay. (1760) ''A General History of the Lives, Trials, and Executions of All t ...

. The manuscript shows a large vase lying on a table, with an

armor Armour (Commonwealth English) or armor (American English; see American and British English spelling differences#-our, -or, spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, e ...

ed man behind it holding a rudimentary

linstock A linstock (also called a lintstock) is a staff with a fork at one end to hold a lighted slow match. The name was adapted from the Dutch ''lontstok'', "match stick". Linstocks were used for discharging cannons in the early days of artillery; th ...

near the bottom (in this case the linstock would have held a red-hot wire, heated in a brazier, rather than a slow match). A bolt, called a garrot, protrudes from the muzzle. Although illustrated in the treatise, no explanation or description was given.Nossov, Konstantin; ''Ancient and Medieval Siege Weapons'', UK: Spellmount Ltd, 2006, pp 205-208, The first confirmed usage of a ''pot-de-fer'' in Germany was during the

Eltz Feud The Eltz Feud () was a 14th-century feud that arose between rulers of the Trier region on the Moselle and certain members of the knightly class who were acting independently and failing to support their sovereign princes. It came about as a resu ...

between 1331 and 1337 at a siege of

Eltz Castle Eltz Castle () is a medieval castle nestled in the hills above the Moselle between Koblenz and Trier, Germany. It is still owned by a branch of House of Eltz who have lived there since the 12th century. Eltz Castle along with Bürresheim Castl ...

.Wilfrid Tittmann; ''Die Eltzer Büchsenpfeile von 1331–1333''. In: Waffen- und Kostümkunde, Band 36 (1994), pp. 117–128, Band 37 (1995), pp. 53–64 The ''pot-de-fer'' was used by the French in the

in a raid on

Southampton Southampton is a port City status in the United Kingdom, city and unitary authority in Hampshire, England. It is located approximately southwest of London, west of Portsmouth, and southeast of Salisbury. Southampton had a population of 253, ...

and in battles in

Périgord Périgord ( , ; ; or ) is a natural region and former province of France, which corresponds roughly to the current Dordogne department, now forming the northern part of the administrative region of Nouvelle-Aquitaine. It is divided into f ...

Cambrai Cambrai (, ; ; ), formerly Cambray and historically in English Camerick or Camericke, is a city in the Nord department and in the Hauts-de-France region of France on the Scheldt river, which is known locally as the Escaut river. A sub-pref ...

, and Quesnoy. They may also have been used against the Scottish by the English. An early reference to the name in French is as ''pot de fer a traire garros'' (an iron jug for throwing arrows).Dana, Charles E., ''Notes on Cannon - Fourteenth and Fifteenth Centuries'' in ''Proceedings of the American Philosophical Society'', Vol. 50, No. 199 (May - Aug., 1911), pp. 147-167 Such a 'pot de fer' had a bottle shape, which may have suggested its name.

Scholarly interest and research

The unusual vase-like shape of the cannon, coupled with the depicted arrow projectile, caused many modern historians to doubt the efficiency — or even existence — of the weapon. In order to establish these points, researchers at the

Royal Armouries The Royal Armouries is the United Kingdom's national collection of arms and armour. Once an important part of England's military organization, it became the United Kingdom's oldest museum, and one of the oldest museums in the world. It is als ...

reconstructed and trialled the weapon in 1999. The walls of the chamber were very thick to prevent explosion, leaving a cylindrical bore which was loaded by a wooden arrow with bronze flights (also reconstructed based on archeological findings), of 135 cm length. Estimating the size of the cannon from the illustrated man standing beside it, the reconstructed cannon was 90 cm long, and 40 cm at its widest point; cast in bronze the reconstruction weighed 410 kg. The subsequent trials showed that the gun was not powerful, firing the arrow only 180 m at most; a larger charge of powder resulted only in the destruction of the arrow.

References

{{Early firearms Cannon Medieval artillery Artillery of France

Description

Historical uses and mentions

Scholarly interest and research

See also

References