 He was present in Rome at a synod of Pope Alexander II, probably the one held in February or March 1073.On 27 November 1074, Pope Gregory wrote a letter to Bishop Dionysius of Piacenza, advising him that he was sending legates (who were carrying the letter) in order to settle several long-running disputes which raged in that diocese, and occasioned accusations in the Papal Court.These disputes included the Bishop, on the one side, and the Abbot of S. Sepulcro; the People of Piacenca; and the subdeacon Bonizo.