Roman Pope. He was an unusual type and hard to pin down: on the one hand, he was a talented and ruthless secular administrator and an exceptional diplomat, but on the other, he was full of prejudices and taken in by the miracles of ascetic monks. He saw ignorance as the substance of true piety and forbid any books apart from the Bible. He was averse to natural sciences, especially maths, as he thought they were linked to black magic (what use is philosophy, literature and maths to believers anyway?). The great reformist John Calvin raved about Gregory and considered him the last good pope.