Son and successor of Philippe II Auguste and Isabelle de Hainaut, it continued the reconquest, started with his father, of the French fields of king d' Angleterre by driving out the English of Poitou (victory over Jean without Ground, on on July 2nd, 1214, with the Rock-with-Monks, close to Angers).

He saw himself proposing the crown of England by the English barons revolted against their king (1215) and, in spite of the opposition of the pope, undertook to conquer England (May 1216), in which he failed (demolished of Lincoln, May 1217).

He reconquered nevertheless on Plantagenêts part of Gascogne and Saintonge (1224), then prepared the fastening of Languedoc to the Crown of France by taking the head of the crusade against the Albigensians and while seizing Avignon (1226).

Married in 1220 in Blanche of Castille, he was the father of Saint-Louis.