Pope Urban III
Bishop Carbo was the first to grant the Canons of the cathedral the right to use the title "canonicati", on 6 September 1165, and he recognized all their rights and privileges. These had already been confirmed by Pope Eugenius III in 1152, and were confirmed again by Pope Urban III in 1186, by Pope Honorius III in 1218, and by Pope Julius II in 1504.