Aquinas: The Great Apologist:

Theology reached a pinnacle with Thomas Aquinas. Sure, he may have seemed unassuming, but he was quietly putting the puzzle pieces together from all the thinkers that came before him. Aquinas merged philosophy and theology once and for all. He took Anselm's legendary ontological argument and decided to make five more! This was a golden age of theology, although a changing modern world was knocking at the door.