Anselm of Canterbury, OSB (; 1033/4–1109), also called () after his birthplace and () 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. As archbishop, 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 bishops of southern Italy to adopt Roman rites at the Council of Bari. He worked for the primacy of Canterbury over the bishops of York and Wales but, though at his death he appeared to have been successful, Pope Paschal II later reversed himself and restored York's independence. Beginning at Bec, Anselm composed dialogues and treatises with a rational and philosophical approach, sometimes causing him to be credited as the founder of Scholasticism. Despite his lack of recognition in this field in his own time, Anselm is now famed as the originator of the ontological argument for the existence of God and of the satisfaction theory of atonement. He was proclaimed a Doctor of the Church by a bull of Pope Clement XI in 1720. Biography Family Anselm was born in or around Aosta in Upper Burgundy sometime between April 1033 and April 1034. The area now forms part of the Republic of Italy, but Aosta had been part of the post-Carolingian Kingdom of Burgundy until the death of the childless Rudolph III in 1032. The Emperor and the Count of Blois then went to war over his succession. Humbert the White-Handed, Count of Maurienne, so distinguished himself that he was granted a new county carved out of the secular holdings of the bishop of Aosta. Humbert's son Otto was subsequently permitted to inherit the extensive March of Susa through his wife Adelaide in preference to her uncle's families, who had supported the effort to establish an independent Kingdom of Italy under William V, Duke of Aquitaine. Otto and Adelaide's unified lands then controlled the most important passes in the western Alps and formed the county of Savoy whose dynasty would later rule the kingdoms of Sardinia and Italy. Records during this period are scanty,