Archaeological investigations in the centre of Carinola in Piazza Vescovado brought to light five rooms probably belonging to the service area of the earliest medieval basilica, partially destroyed by the rebuilding of the church in 1558.

The materials recovered (fragments of spiral ware pottery, banded pottery, numerous proto-maiolica cups and bowls with vegetal decorative motifs in copper green and manganese brown, proto-maiolica jugs with decoration in yellow oxide and copper green, sauce boats with vegetal and animal motifs, numerous fragments of finely worked glass bottles jugs) date the structures to between the 12th and 15th century A.D. A burial in an earth grave, without any grave goods, containing a perfectly preserved female skeleton, dates to a later phase.