Title: Mensur, cantus firmus, Satz in den Caput-Messen con Dufay, Ockeghem und Obrecht
Subjects: Masses, Church music, Catholic Church, History and criticism, Music
People: Johannes Ockeghem (approximately 1410-1497), Guillaume Dufay (-1474), Jacob Obrecht (-1505)
Time periods: 15th century