Week 1 Music - Machaut

http://en.wikipedia.org/wiki/Messe_de_Nostre_Dame

Messe de Nostre Dame (Mass of Our Lady) is a polyphonic mass composed before 1365 by the French poet, composer and clericGuillaume de Machaut (circa 1300-1377). One of the great masterpieces of medieval music and of all religious music, it is the earliest complete setting of the Ordinary of the Mass attributable to a single composer.