Guillaume de Machaut - Mass - Notre Dame - I. Kyrie eleison

The Messe of Nostre Dame (Mass of Our Lady) is a polyphonic mass composed before 1365 by the French poet, composer and cleric Guillaume 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.