'INCESSAMENT' Ð hidden behind this mysterious title is an exciting CD program at whose center stands the world premiere recording of the Missa Incessament by Pierre de la Rue (c. 1452-1518). Gregorian chant from the Moosburg Gradual supplements the Mass. Two of de la Rue's compositions with close connections to the Mass frame the program: the French chanson Incessament, on which the Missa Incessament is based, and its incarnation as a Latin motet Ð Sic deus dilexit Ð for Protestant Germany. The program was planned in collaboration with J. Evan Kreider, the leading de la Rue researcher, and Gregorian-chant expert Godehard Joppich. This CD was recorded in the marvelous basilica of the Benedictine Monastery at Wechselburg, Saxony, providing the music with an appropriate atmosphere.