 And of course, there's a lot of folklore about Pope Peter the Second, who would supposedly be the last pope before the Apocalypse (Pope Peter the First, of course, being the Apostle, who's reckoned as the first pope). IIRC, we're now past the point in the list of popes where Peter II is supposed to fall, but it's not like that's ever stopped any end-of-the-world doomsayers before, so the story has probably been updated. 