Johannes Ockeghem (also Jean de; surname Okeghem, Ogkegum, Okchem, Hocquegam, Ockegham; other variant spellings are also encountered) (c. 1410, Saint-Ghislain, Belgium – February 6, 1497, Tours, France) was the leading composer of the second generation of the Franco-Flemish School. Ockeghem is often considered the most important composer between Dufay and Josquin des Prez, and was one of the most famous composers in Europe in the latter half of the 15th century.