 In the synod of April 1117, he excommunicated Maurice Burdinus, Archbishop of Braga, the antipope (1118–1121) of Emperor Henry V, who called himself Gregory VIII.On 10 March 1119, Archbishop Landolfo held a provincial synod at Benevento, in which anathemas were threatened against persons who committed theft against church property or merchants.In 1374, Archbishop Hugo stated at a provincial council that the Church of Benevento had twenty-three suffragans, and that documents indicated that at one time it had had thirty-two.