Basilica di San Salvatore. This Basilica on the same side and not far from the site of San Ponziano at the end of the via del Cimitero. It dates back to the fourth or fifth century. Despite the tampering and modification carried out down through the centuries, the basilica is still one of the rarest and most important examples of early Christian architecture. The façade is now undergoing restoration. It has three rather elegant portals and displays some fantasy in its decorative elements. Above these there are three large windows with small pillars to their sides placed against the wall. The central pillar is surmounted by a small round arch, whereas the other two are surmounted by a tympanum. On the inside the nave and two aisles are divided by Doric columns previously used elsewhere. These once probably supported trabeation which was substituted with blind arches after a fire in the eighth century. It is, however, still visible in the presbytery where there are certain Corinthian columns, which had also been used elsewhere, now supporting the dome The nave has large windows and ends in a circular apse with two square apses next to it.