San Paolo Fuori le Mura - entrance
Unlike most of Rome's basilicas, which have three aisles, S. Paolo is a five-aisled church. Eighty granite columns separate the four side aisles from the central nave. Above the columns are mosaic portraits of all 263 Popes, with only the current Pope's portrait illuminated. Currently, there are only eight vacant spots left for Popes and tradition states that when space runs out the world will end.
