In the 4th century AD, two new rooms were built in the north-western sector of the villa, above the structures of the baths. The largest (room 13) consists of a large room with a rectangular plan, interpreted as a hall for banquets. The room, oriented NE/SW, was characterised by the presence of three apses at the NE end, one located in front of the entrance and the other two on the sides. The two lateral apses were characterised by a niche for a statue (north) and a sill (south). In the central apse there was the stibadium, a sigma-shaped dining table, surrounded by wooden beds arranged in a radial pattern and placed next to each other, on which the diners could lay down. The room was paved with white marble slabs framed by red marble listels. Large banquet halls like this one became widespread in the late Roman age and remarked the importance of the “master of the house”: he sat in the centre of the apse, in a privileged position typical of an era in which social hierarchies became stronger and more rigid.

The hall communicated to the SE with a rectangular room (room 22). The room had marble slabs of different colours on the floor. These were arranged to form geometric patterns: the central panel had a square containing an inscribed octagon, in which a filleted circle was inscribed. Another square was inscribed into the circle.