Philip was born in Pontoise in 1342 to John, eldest son of King Philip VI of France, and Bonne of Luxembourg. His father became king of France in 1350. Philip became known as "the Bold" at the age of 14, when he fought beside his father at the Battle of Poitiers of 1356. They were captured during the battle by the English. He remained in custody with his father until the terms of their ransom were agreed to in the Treaty of Brétigny of 1360. He was created duke of Touraine in 1360, but in 1363, he returned this duchy to the crown to receive instead the Duchy of Burgundy in apanage from his father as a reward for his courage at the Battle of Poitiers.