Petrus Baldus de Ubaldis Edit Profile
Baldus de Ubaldis studied civil law at Perugia under Bartolus, being admitted to the degree of doctor of civil law at the early age of seventeen. Federicus Petrucius of Siena is said to have been the master under whom he studied canon law.
Baldus de Ubaldis at once proceeded to Bologna upon his promotion to the doctorate, where he taught law for three years; after which he was advanced to a professorship at Perugia, where he remained for thirty-three years. He taught law subsequently at Pisa, at Florence, at Padua and at Pavia, at a time when the schools of law in those universities disputed the palm with the school of Bologna. He died at Pavia on the 28th of April 1406. Baldus was the master of Pierre Roger de Beaufort, who became pope under the title of Gregory XI, and whose immediate successor, Urban VI, summoned Baldus to Rome to assist him by his consultations in 1380 against the anti-pope Clement VII. Cardinal de Zabarella and Paulus Castrensis were also amongst his pupils. His brothers Angelus (1328 - 1407) and Petrus (1335–1400) were of almost equal eminence with himself as jurists.