Anselm of Canterbury

Anselm of Canterbury OSB, also called Anselm of Aosta after his birthplace and Anselm of Bec after his monastery, was an Italian Benedictine monk, abbot, philosopher, and theologian of the Catholic Church, who held the office of Archbishop of Canterbury from 1093 to 1109. After his death, he was canonized as a saint; his feast day is 21 April. He was proclaimed a Doctor of the Church by a papal bull of Pope Clement XI in 1720.
As Archbishop of Canterbury, he defended the church's interests in England amid the Investiture Controversy. For his resistance to the English kings William II and Henry I, he was exiled twice: once from 1097 to 1100 and then from 1105 to 1107. While in exile, he helped guide the Greek Catholic bishops of southern Italy to adopt Roman rites at the Council of Bari. He worked for the primacy of Canterbury over the archbishop of York and over the bishops of Wales but, though at his death he appeared to have been successful, Pope Paschal II later reversed papal decisions on the matter and restored York's earlier status.