The third excavation campaign saw the completion of excavations in sector 3500, the opening of sector 2500, by the east tower, area 5000 situated in the central part of the keep, and area 7000 in the western part of the borgo.

Traces of early medieval occupation were attested in sector 2500 by five cuts in the bedrock and the construction phases, respectively 10th and 12th century, of the buildings pre-dating the tower, and of the curtain wall surrounding it.

Sector 3500 revealed evidence of 3rd century B.C. occupation relating to the presence of a Ligurian settlement. A probable early medieval phase was attested by the presence of a wall made of perishable material, perhaps a hut, associated with a hearth. In this area, the curtain wall around the keep was seen to be constructed directly on the levelling of a rocky slope.

Area 5000 comprised three pairs of rooms, arranged on two different levels and facing north. They were separated by alleyways, running parallel to the buildings, built directly on the bedrock, which from the main path on the ridge provided access to peripheral structures. The excavation of the eastern pair of rooms showed they were probably built between the 9th and 12th century and abandoned in the first half of the 13th century. The upper room was constructed by levelling the rocky profile of the hillside and partially exploiting it for the walls. The interior comprised a single space with the bedrock forming the floor surface and a hearth in the central-eastern sector, in correspondence with a vertical cut in the rock in the room’s eastern corner, interpreted as a chimney. Only the eastern half of the room on the lower level was excavated. It was on the same alignment as the upper room with which it shared its long wall. A semi-cylindrical storeroom/larder opened in this wall. The post-medieval agricultural levels overlay the collapsed walls and, partially the collapsed roofing made up of schist slates, robbed prior to its complete collapse. The walls of this room also abutted the rock, while the floor surface had been created by levelling the bedrock with dumps of the waste materials from stone working and the smoothing of the rock surface.

Excavations in sector 7000 revealed the presence of two overlying, partially rock-cut rooms. The interior of the lower room was filled by the collapse of the walls and underlying roof collapse. The materials collected in the surface layers were richer both in quantity and variety with respect to what was seen in area 5000. Their dating showed a continuity of occupation well into the 13th century, suggesting greater continuity of use in the lower part of the site than on the summit.