Charles of Valois (12 March 1270 – 16 December 1325) was the third son of Philip III of France and Isabella of Aragon. He was a member of the House of Capet and founded the House of Valois. In 1284, he was created Count of Valois (as Charles I) by his father and, in 1290, received the title of Count of Anjou from his marriage to Margaret of Anjou. Through his marriage to Catherine I, titular empress of the Latin Empire, he was titular Latin Emperor of Constantinople from 1301–1307, although he ruled from exile and only had authority over Crusader States in Greece.