The Château d'Anet is a château near Dreux, France, built by Philibert de l'Orme from 1547 to 1552 for Diane de Poitiers, the mistress of Henry II of France. It was a gift from the king and was built on the former château at the center of the domains of Diane's deceased husband, Louis de Brézé, seigneur d'Anet, Marshal of Normandy and Master of the Hunt. The château was built partly upon the foundations and cellar vaults of a feudal castle that had been dismantled by Charles V and was subsequently rebuilt as a Late Gothic manor of brick and stone.