CASTRENSIS, PAULUS, an Italian jurist of the 14th cen tury. He studied under Baldus at Perugia, and was a fellow-pupil with Cardinal Zabarella. He was admitted to the degree of doctor of civil law in the University of Avignon, but it is uncertain when he first undertook the duties of a professor. A tradition, which has been handed down by Panzirolus, represents him as having taught law for a period of 57 years. He was professor. at Vienna in 1390, at Avignon in 1394, and at Padua in 1429; and, at differ ent periods, at Florence, at Bologna and at Perugia. He was for some time the vicar general of Cardinal Zabarella at Florence, and his eminence as a teacher of canon law may be inferred from the language of one of his pupils, who styles him "famosissimus juris utriusque monarca." His most complete treatise is his read ings on the Digest, and it appears from a passage in his readings on the Digestum Vetus that he delivered them at a time when he had been actively engaged for 45 years as a teacher of civil law. His death is generally assigned to 1436, but it appears from an entry in a ms. of the Digestum Vetus, which is extant at Munich, made by the hand of one of his pupils who styles him "praeceptor meus," that he died on July 20, 1441.