“As the primacy of the apostolic see is based on the title of the blessed Peter, … no illicit steps may be taken against this see to usurp its authority.” During his papacy, Leo I condemned heretics, convinced emperors to call councils, and then ignored certain rulings of those councils—all in an effort to make the bishop of Rome the uncontested head of the church. But it was a conversation with the infamous Attila the Hun and the Vandal general