Anselm of Canterbury was an Italian Benedictine monk, philosopher, and theologian who lived from 1033 to 1109. He is best known for his work in the field of Christian theology and for formulating the famous ontological argument for the existence of God. Anselm's writings emphasized faith seeking understanding, and he played a significant role in the development of medieval scholasticism. Anselm served as the Archbishop of Canterbury and was involved in various church controversies of his time. His notable works include "Proslogion" and "Monologion," where he explored the nature of God and the relationship between faith and reason. Anselm's influence extended beyond his lifetime, impacting later thinkers such as Thomas Aquinas and shaping Christian philosophy.