Martinus, Polonus or BOHEMUS, a Polish chronicler and ecclesiastic of the 13th century, was born at Troppau, in Silesia; entered the Dominican Order; became chaplain and confessor to pope Clement IV, and to several of his successors; and in 1278 was appointed archbishop of Gnesen. He died shortly after at Bologna (1278). He wrote valuable works in the department of ecclesiastical history, including biographies of several popes. His most important production is the Chronicon de Summis Pontificibus. See Hoefer, Nouv. Biog. Generale, 34:27.