Roscelin of Compiègne (), better known by his Latinized name Roscellinus Compendiensis or Rucelinus, was a French philosopher and theologian, often regarded as the founder of nominalism. Biography Roscellinus was born in Compiègne, France. Little is known of his life, and knowledge of his doctrines is mainly derived from Anselm and Abelard. He studied at Soissons and Reims, was afterwards attached to the cathedral of Chartres and became canon of Compiègne. As a monk of Compiègne, he was teaching as early as 1087. He had contact with Lanfranc, Anselm and St. Ivo of Chartres. It seems most probable that Roscellinus was not strictly the first to promulgate nominalistic doctrines; but in his exposition they received more definite expression, and being applied to the dogma of the Trinity, attracted universal attention. Roscellinus maintained that it is merely a habit of speech which prevents our speaking of the three persons as three substances or three Gods. If it were otherwise, and the three persons were really one substance or thing (una res), we should be forced to admit that the Father and the Holy Spirit became incarnate along with the Son. Roscellinus seems to have put forward this doctrine in perfect good faith, and to have claimed for it at first the authority of Lanfranc and Anselm. In 1092/1093, however, a council convoked at Soissons by the archbishop of Reims condemned his interpretation, and Roscellinus, who was accused of tritheism, recanted the doctrines attributed to him, but only out of fear of excommunication and even stoning to death by the orthodox populace, for later he returned to his early theories. He fled to England, but having made himself unpopular by an attack on the doctrines of Anselm, he left the country and repaired to Rome, where he was well received and became reconciled to the Catholic Church. He then returned to France, taught at Tours and Loc-menach (Loches) in France (where he had Abelard as a pupil), and finally became canon of Besançon. He is heard of as late as 1121, when he came forward to oppose Abelard's views on the Trinity. He was also sent a letter by Theobald of Étampes for having denigrated wrongfully the sons of priests. Of his writings there exists only a letter addressed to Abelard on the Trinity, in which Roscellinus "belittles Abélard and makes merry over his castration." Hauréau brings forward his name in connection