Philip III (French: Philippe le Bon; Dutch: Filips de Goede; 31 July 1396 – 15 June 1467) was Duke of Burgundy from 1419 until his death. He was a member of a cadet line of the Valois dynasty, to which all 15th-century kings of France belonged. During his reign, the Burgundian State reached the apex of its prosperity and prestige, and became a leading centre of the arts. Philip is known historically for his administrative reforms, his patronage of Flemish artists such as van Eyck and Franco-Flemish composers such as Gilles Binchois, and perhaps most significantly the seizure of Joan of Arc, whom Philip ransomed to the English after his soldiers captured her, resulting in her trial and eventual execution. In political affairs, he alternated between alliances with the English and the French