Dionigi di Borgo San Sepolcro, Italian Augustinian monk
Dionigi di Borgo San Sepolcro OESA (Roberti of Roberti, Dennis) (c. 1300 – 31 March 1342) was an Augustinian monk who was at one time Petrarch's confessor, and who taught Boccaccio at the beginning of his education in the humanities. He was Bishop of Monopoli in Apulia. He was surnamed, not uncommonly for the trecento, for the town in which he was born, now Sansepolcro in Tuscany. His family name was de' Roberti, which no longer exists. Dionigi is the Italian form of Dennis, Latin Dionysius.