Question: Besides the Holy Roman Emperor, who was also considered the a universal power or the pontifex Maximus?
Sentence (from "Pope"): The primacy of the Roman bishop is largely derived from his role as the purported apostolic successor to Saint Peter, to whom Jesus is supposed to have given the keys of heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built.
Relevant evidence: No