Anselm IV (also Anselm of Buis, Italian: Anselmo da Bovisio) was the Archbishop of Milan from 3 November 1097 to his death on 30 September 1101. He was a close friend of Pope Urban II and prominent in the Crusade of 1101, whose Lombard contingent he led and on which he died. Under were corrected the irregularities of the past decades at a synod held from 5 – 7 April 1098. He affirmed the excommunication of imperial-appointed bishops and condemned simony. He accepted the acts of Anselm III, but not those of Tedald.