Troyes is a commune of France. It is the capital city of the Aube department in north-central France. It is on the Seine river about southeast of Paris. It was briefly the capital of France in the early 15th century.
The name troy weight for gold derives from the standard of measurement which developed in Troyes.

History
Troyes has existed since Roman times. It was the capital of the Counts of Champagne.

The first Lord of Troyes was Gwain de Nantouillet in 884.

In 1417, the Duke of Burgandy and Isabeau of Bavaria, wife of Charles VI of France, planned to establish the capital of France at Troyes. This included a court, council, and parliament with comptroller's offices.
In 1419-1425, during the Hundred Years' War, Troyes was the center of the royal government.
Timeline
878 – Louis the Stammerer is crowned King of France by Pope John VIII
884 – Gwain de Nantouillet is crowned Lord of Troyes by the king of France Charles the Fat 1262 – Pope Urban IV begins construction of church in honor of St Urban. 1285 – Philip the Fair confirms traditional privileges of the city 1420 – Treaty of Troyes 1429 – Joan of Arc and the Dauphin of France enter the city. 1524 – Fire destroyed much of the medieval city





