After the Goths' raids in 545 AD Septempeda was abandoned and its inhabitants found refuge in the safer top of Monte Nero, a few kilometres west and on the opposite side of the River Potenza.

A legend of the Longobard age associated to the transfer of Severino, is believed to demonstrate the existence of a veneration for the Saint, which received a written confirmation from a document of 944 by Bishop Eudo, about the building of a church in Castello qui dicitur ad Sancto Severinum.

Almost centrally located are large baths consisting of a courtyard, a portico, a pool, a caldarium and other rooms with heated flooring, of which many were originally paved with mosaics.

The foundations of the walls and the remains of the eastern and south-western gates of Septempeda, located in "La Pieve", east of the present-day town, can be seen together with a baths building, probably near the forum.

Outside the town walls remains of a furnace for the production of pottery, a private domus with mosaics and cemetery areas with tombs from the 1st and 2nd centuries AD have been excavated.

The cathedral of Santa Maria in Septempeda was probably built in Late Roman times and there, according to tradition, Bishop Severino was buried and hidden to protect his remains from barbarians.