Situated alongside of Ostiense road, for go there you just have to make the bus number 769 a ad 770. Built above the tomb of the apostle Paolo by Constantino the bilbing has been modified many times during the XIX centuri because of one fire that practicaly destroyed the place. The external quadruple arches of 146 columns that precede the facade are great.The inner is divided in fives naves, and a long frieze represents the 263 popes who succeded San Pietro. In one part of the basillica you will find the museum of San Paolo's monastery, the entrance is free but closed during the lunch-time.