Petrus de Cruce

Petrus de Cruce (Pierre de la Croix) was active as a cleric, composer and theorist in the late part of the 13th century. His main contribution was to the notational system. Life 13th-century composer, theorist, and scholar, Petrus de Cruce was apparently born in or near Amiens, in north-central France; for dates we know only that he was active in the years around 1290. He held the title of magistar, indicating that he probably studied at the University of Paris.