Cabasilas, Nilus, uncle of the preceding, a Greek theologian, and archbishop of Thessalonica in the first half of the 14th century. He wrote Περὶ τῶν αἰτιῶν τῆς ἐκκλησιαστικῆς διαστάσεως, first printed at London (n. d.), afterward, Greek and Latin, at Basel (1544); again at Frankfort (1555), and at Hainault (1608). In it he shows that the arbitrary claims of the papacy were the true cause of the schism between the East and West. He wrote also Περὶ τῆς ἀρχῆς τοῦ Πάπα (Francfort, 1555, 8vo; Hanover, 1608, with the works of Barlaam). Dupin says that these writings are "full of learning." The book on the papal supremacy was translated into English by Gressop (London, 1560, 8vo). Cabasilas died in 1350.-Hoefer, Nouv. Biog. Generale, 8:15; Cave, Hist. Lit., Wharton's Appendix; Dupin, Ecclesiastes Writers, cent. 14.