Pierre de Champvent
Pierre de Champvent was a noble originally from Savoy who made a career as a military and courtier in England.
Origin and move to England
Pierre de Champvent came from the Champvent family, a noble family from Vaud, which was under the influence of the county of Savoy in the 13th century. He was a son of Henri, Lord of Champvent, and his brothers were Guillaume and Othon de Champvent, who both later became bishops of Lausanne. Like his brothers, Pierre probably came to England with his uncle Pierre de Grandson and his cousin Otto de Grandson in the entourage of Peter II, Count of Savoy, an uncle of Queen Eleanor of Provence.Rise under Henry III
Champvent is first mentioned in England in 1252. Serving as a steward at the court of King Henry III of England. Before 1259 he was knighted. His influence at court in 1262 is evidenced by his joining the Savoyard witness list for a charter relating to Queen Alianor's dowry.As a knight of the royal household, he took part in the capture of Northampton in 1264 and in the siege of Kenilworth Castle in 1266 during the Second Barons' War. He brought additional artillery for the siege to Kenilworth from Nottingham Castle, “one ballistam de trullio and four balistas ad duas pedes”
In 1269 he served as Sheriff of Gloucestershire and the constable of Gloucester Castle. The king rewarded him with land ownership, two guardianship administrations and other privileges. In Vaud, after the death of his father before 1264, he inherited the Champvent lordship, which he had managed by castellans while he was away in England. There it is only occasionally documented, but probably during his reign, Champvent Castle was built towards the end of the 13th century based on the model of Yverdon-les-Bains Castle which had been the first castle built by the famous Savoyard master mason James of Saint George.