(1323), Libellus cantus mensurabilis (c. 1340), and Ars contrapuncti (post 1340) (all dates are suggested dates by U. Michaels). Many of the surviving manuscripts of these treatises are from the 15th century and of Italian origin, suggesting his wide influence both geographical and temporal. References Sources Further reading 1290 births 1355 deaths Medieval French mathematicians French musicians French music theorists 14th-century French mathematicians French male non-fiction writers Medieval French astronomers 14th-century astronomers 14th-century French writers 14th-century Latin writers Medieval music theorists