It is one of the most important monuments of early Christian art in Italy. The monument is of the sixth century, of clear eastern influence, it has an octagonal plan, surmounted by a large frescoed dome. When one enters the basilica, the gaze is captured by the high spaces, the stupendous mosaic decorations of the apse, and the extraordinary representation of the imperial couple from Byzantium, Giustiniano and Teodora, with their parades.

one of the oldest monuments in the city, in simple brick on the outside but rich in marble, stucco and mosaics with a clear Hellenistic-Roman influence on the inside. Dominating the dome, commissioned by Bishop Neone in the mid-fifth century, is the scene of the Baptism of Christ surrounded by a very refined procession of the twelve Apostles that stands out against a brilliant background of blue tesserae. Inside there is still the baptismal font from the Renaissance period, which takes up the octagonal shape of the Baptistery plan and which preserves the ambo from the 5th century.