He was made bishop of Monreale, near Palermo, in 1278, and was there at the time of the Sicilian Vespers (1282). After fleeing Sicily. , he was made cardinal-bishop of Frascati on 22 December in 1285, by Honorius IV.
He participated in five papal conclaves, which saw the elections of popes Nicholas IV in 1288, Celestine V in 1294, Boniface VIII in 1294, Benedict XI in 1303 and Clement V in 1305. He became dean of the Sacred College of Cardinals in 1302.
- Picture (Italian)