Antoine d'Arcy, sieur de la Bastie-sur-Meylan and of , (d. 18 September 1517) was a French nobleman involved in the government of Scotland.
Antoine d'Arces, or d'Arcy, is usually known as "De la Bastie" or "Labatie" in Scottish history. He was the son of Jesus d'Arces, sieur de la Bâtie and Anthoinette Baile (or Huguette). In his lifetime he was called the White Knight, (Chevalier Blanc), from his white clothes, white armour, or a white scarf worn as the favour of Anne of Brittany. Antoine came to Scotland for the notable tournaments of James IV and the king's marriage to Margaret Tudor in 1502, and he was a friend of John Stewart, Duke of Albany. Antoine issued an international 'cartel' - a tournament challenge, in 1506, and travelled to Scotland where he stayed for 18 weeks at the king's expense. He jousted with James Hamilton, 1st Earl of Arran at Stirling Castle in January 1507. James IV gave him 400 crowns and paid for his horse's hoofs to be bathed in wine. He returned to France with the Archdeacon of St Andrews, Gavin Dunbar on the Treasurer on 18 May 1507.
He served in the Italian Wars and was captured at Agnadello in 1509 by the Venetians. Antoine married Françoise de Ferrières, dame de Livarol. They had two children; Jean d'Arces, baron de Livarol, and Anne.
He came to Scotland immediately after the Scots' defeat at Flodden to help form Albany's government. Antoine returned with some ships of the Royal Scots Navy which had been lent to France. As a French ambassador, his instructions from Louis XII of France dated 5 October 1513 include: commiserating with Margaret Tudor; finding out the circumstances of James's death at Flodden; and going to Denmark to give an account of the state of Auld Alliance. Albany also gave him instructions. With a colleague, Master James Ogilvy, de la Bastie represented French interest at a parliament or council at Perth, 26 November 1513, which called for French aid and the return of Albany to be Regent of Scotland. Antoine went to Christian II of Denmark with Sir Andrew Brownhill in January 1514. He was to promote the mutual benefits of the Danish king's marriage to a French noblewoman, Madeleine de La Tour d'Auvergne, Albany's sister-in-law.