Philip III of France sibling Louis of France
Early life
Philip was born in Poissy on 1 May 1245, the second son of King Louis IX of France and Margaret of Provence. As a younger son, Philip was not expected to rule France. At the death of his older brother Louis in 1260, he became the heir apparent to the throne.Philip's mother Margaret made him promise to remain under her tutelage until the age of 30; however, Pope Urban IV released him from this oath on 6 June 1263. From that moment on, Pierre de la Broce, a royal favourite and household official of Louis IX, was Philip's mentor. His father, Louis, also provided him with advice, writing in particular the Enseignements, which inculcated the notion of justice as the first duty of a king.According to the terms of the Treaty of Corbeil (1258), concluded on 11 March 1258 between Louis IX and James I of Aragon, Philip was married in 1262 to Isabella of Aragon in Clermont by the archbishop of Rouen, Eudes Rigaud.
brother or sister kin