 At the disastrous siege of Beauvais in 1472, Antoine reportedly lost his best jewels.In 1475, he was again sent as a diplomat to the King of England, the Duke of Brittany, the Kings of Sicily, Portugal, Aragon and Naples, and to Venice and the Pope, who received him with great honour.In the middle of these travels, he managed to find time to call in at the siege of Neuss, and later that year he participated in the conquest of the Duchy of Lorraine.