German-Polish chronicler, surnamed the 'Pole' (Polonus). Died in Bologna, 29 June 1278. Perhaps born in Troppau. Entered the Order of the Dominicans. Chaplain of Pope Clemens IV and of some of his successors. Appointed archbishop of Gnesen (Poland) on 22 June (21 May ?) 1278, he died in Bologna on the way to his see.