The Master of Crossbowmen or more precisely, Master of Arbalest

Arbalest

The arbalest was a late variation of the medieval European crossbow. A large weapon, the arbalest had a steel prod . Since an arbalest was much larger than earlier crossbows, and because of the greater compressive strength of steel, it had a greater force...

ers or Master of Archers

Archery

Archery is the art, practice, or skill of propelling arrows with the use of a bow, from Latin arcus. Archery has historically been used for hunting and combat; in modern times, however, its main use is that of a recreational activity...

was the title of a commander of the Infantry

Infantry

Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

 of the French army

French Army

The French Army, officially the Armée de Terre , is the land-based and largest component of the French Armed Forces.As of 2010, the army employs 123,100 regulars, 18,350 part-time reservists and 7,700 Legionnaires. All soldiers are professionals, following the suspension of conscription, voted in...

 (the "ost") in the Middle Ages and the Renaissance. The position was an honorific title, not a military rank, created by Louis IX

Louis IX of France

Louis IX , commonly Saint Louis, was King of France from 1226 until his death. He was also styled Louis II, Count of Artois from 1226 to 1237. Born at Poissy, near Paris, he was an eighth-generation descendant of Hugh Capet, and thus a member of the House of Capet, and the son of Louis VIII and...

. The position existed until the reign of François I

Francis I of France

Francis I was King of France from 1515 until his death. During his reign, huge cultural changes took place in France and he has been called France's original Renaissance monarch...

, when its duties were transferred to the Grand Master of Artillery

Grand Master of Artillery

The Grand Master of Artillery or Grand Maître de l'artillerie was one of the Great Officers of the Crown of France during the Ancien Régime....

.

The Master of the Crossbowmen commanded all archer

Archery

Archery is the art, practice, or skill of propelling arrows with the use of a bow, from Latin arcus. Archery has historically been used for hunting and combat; in modern times, however, its main use is that of a recreational activity...

s (longbow

Longbow

A longbow is a type of bow that is tall ; this will allow its user a fairly long draw, at least to the jaw....

, arbalest

Arbalest

The arbalest was a late variation of the medieval European crossbow. A large weapon, the arbalest had a steel prod . Since an arbalest was much larger than earlier crossbows, and because of the greater compressive strength of steel, it had a greater force...

, crossbow

Crossbow

A crossbow is a weapon consisting of a bow mounted on a stock that shoots projectiles, often called bolts or quarrels. The medieval crossbow was called by many names, most of which derived from the word ballista, a torsion engine resembling a crossbow in appearance.Historically, crossbows played a...

, etc.), engineers and workers on siege engine

Siege engine

A siege engine is a device that is designed to break or circumvent city walls and other fortifications in siege warfare. Some have been operated close to the fortifications, while others have been used to attack from a distance. From antiquity, siege engines were constructed largely of wood and...

s, sapper

Sapper

A sapper, pioneer or combat engineer is a combatant soldier who performs a wide variety of combat engineering duties, typically including, but not limited to, bridge-building, laying or clearing minefields, demolitions, field defences, general construction and building, as well as road and airfield...

s ("sapeurs") and miners for mining fortifications during siege warfare. He was under the command of the Constable of France

Constable of France

The Constable of France , as the First Officer of the Crown, was one of the original five Great Officers of the Crown of France and Commander in Chief of the army. He, theoretically, as Lieutenant-general of the King, outranked all the nobles and was second-in-command only to the King...

 and the Marshals

Marshal of France

The Marshal of France is a military distinction in contemporary France, not a military rank. It is granted to generals for exceptional achievements...

. Under his command was the Master of Artillery, who would come to more prominence in the reign of Louis XI

Louis XI of France

Louis XI , called the Prudent , was the King of France from 1461 to 1483. He was the son of Charles VII of France and Mary of Anjou, a member of the House of Valois....

, with the increased use of artillery.

The office is often considered one of the Great Officers of the Crown of France

Great Officers of the Crown of France

The Great Officers of the Crown of France, known as the Grand Dignitaries of the Empire during the French Empire, were the most important officers of state of the royal court in France during the Ancien Régime and Bourbon Restoration. They were appointed by the French monarch, with all but the...

.