The excavations concentrated on the south-east section of the sanctuary, in the area between the façade of the tempietto of Demeter and the open-air enclosures IV and V, identified during previous campaigns. The aim was to investigate the vicinity of the complex arrangement of cult buildings in the southern part of the sacred area, as georadar surveys undertaken here in 2012 indicated the presence of probable structures at a shallow depth.

The excavations identified a square building (c. 6 × 6 m), well-preserved on the north side, while the southern part seemed to have been effected by a landslide from the south slope of the acropolis, whose remains were found in 2011, that had also cut part of the square in front of the tempietto of Demeter. Below a layer containing late medieval pottery, the collapse of the building’s roof was exposed, made up of tegulae and imbrices mixed with fragments of archaic majolica pottery. Once this rubble was removed, the room was seen to be completely paved with a mortar floor . This was a carefully made mosaic floor in opus tessellatum with travertine type light-coloured stones, decorated at the centre with a square emblema. This was made of bluish stone, probably gabbro, and enclosed a floral motif with six lanceolate petals.

Underneath the mosaic was a make-up of lime mixed with stones and crushed brick/tile, about 10 cm thick. A preliminary analysis of the mosaic suggests it was laid in the second half of the 2nd century B.C., thus the building must have been part of a scenographic terracing together with the adjacent tempietto of Demeter. A mortar floor surface was uncovered to the west of the building with the mosaic, abutting its perimeter wall. The fragments of black glaze pottery with grey fabric and early Italian sigillata that were present date the mortar floor to the mid 1st century B.C. The presence of a late medieval roof collapse directly in contact with a late Hellenistic floor, suggests that the building had a long life and underwent numerous alterations during the course of time.

A section of wall about two metres long was identified (but not excavated) close to the eastern edge of the trench. It was built of medium-large stone blocks and probably belonged to the sanctuary’s temenos.