Mensural and polyphonic music of the fourteenth century and a new source for the Credo of Tournai in a gradual of the Basilica di Santa Maria Maggiore in Rome

An early fourteenth-century gradual produced for use in Avignon and today preserved in Rome at the Basilica di Santa Maria Maggiore is a new source for understanding the musical and liturgical exchange between France and Italy in the fourteenth century. The present article will consider compositions written after the main body of the gradual, and found now in the initial fascicle and on the last three folios of the manuscript. These folios contain a hitherto unknown source for the Credo of Tournai as well as other works not recorded elsewhere; for example, a polyphonic Gloria, a polyphonic Credo, a troped Sanctus and a Credo in cantus fractus.