Anselm of Aosta was an Italian-born English theologian, monk, and abbot at the Benedictine abbey of Bec served as Archbishop of Canterbury under William II from 1093 to his death on 1109. He is held to be a Saint in the Roman Catholic, Anglican, and Lutheran churches, and was proclaimed a Doctor of the Church by a bull of Pope Clement XI in 1720.

Anselm helped to inaugurate the Scholastic movement in the medieval period, sometimes credited as the "father of scholasticism," and was known for what is today referred to as the "ontological argument" for the existence of God.