Johannes Ockeghem (c. 1410- c.1497) was the leading composer of the Second Dutch School. Ockeghem is considered the most important composer between Dufay and Josquin Des Prez.
Although often thought to be Flemish, Ockeghem was born in Saint-Ghislain, in the provence of Hainaut (now part of modern Belgium), part of the Duchy of Burgundy. Like many composers in this period, he started his musical career as chorister: in his case, in the Notre Dame in Antwerp. Around 1452 he moved to Paris where he served as maestro di cappella to the French court, as well as becoming treasurer of the St. Martin cathedral in Tours.
Very few of his works have survived: some 14 masses, 10 motets, some 25 chansons, and a single requiem. This Missa pro Defunctis is the earliest surviving example of a polyphonic requiem mass.
A strong influence on Josquin Des Prez, Ockeghem was famous throughout Europe for his expressive music and his technical mastery. His technical prowess is demonstrated most clearly in the astonishing Missa Prolationem, composed entirely in canonical style, and his no less astonishing 36(!) part canon Deo Gratias. - but even these technique-oriented masterpieces demonstrate his insightful use of vocal ranges and unique expressive tonal language. Being a renowned bass singer himself, certainly his use of complex bass lines sets him apart from the other composers in the Dutch Schools.
To commemorate his death, Josquin Des Prez composed Nymphes des Bois on a poem by Molinet.