The 2015 campaign concentrated on the investigation of two sectors: the north-eastern area, where work began in 2014 and is of particular interest, and that to the west, where it was thought possible to intercept the rest of the sanctuary’s containing wall, of which some sectors had been uncovered during earlier excavations.
In the north-eastern sector, the work began with a complete survey of the excavated containing walls. In this eastern area, the structure was at some distance from the known perimeter of the temple, therefore leaving a free area. Here, the upper levels were completely covered by elements of collapse from the destruction of the containing wall. In fact, over time this structure was subject to collapse caused by the pressure from the hill slope and hill-wash. The removal of these substantial layers of collapse revealed the edges of another rectangular structure on a north-east alignment, approximately parallel to the portico’s eastern perimeter wall and situated between the latter and the containing wall.
The archaeological finds, mainly constituted by pottery fragments but also a few bone, metal, and glass elements, suggest an approximate preliminary date for the upper layers between the 1st century B.C. and the 1st century A.D. The presence in these layers of abundant Italian sigillata pottery and two bronze coins dating to the early imperial period was significant. Where the excavation was deeper, the find of abundant well-preserved black glaze pottery and, in one case, of a bronze Republican coin, made it possible to reconstruct a chronology dating back to at least the 2nd century B.C. In the northern part of the room, traces of at least three carbonised timber posts were found. A vast collapse of roof tiles was also documented.

The area between this structure and the containing wall produced an abundance of well-preserved black glaze pottery, including intact forms, which mainly dated to the earliest phases documented thus far. In fact, some fragments seem to date to the 3rd century B.C. and there appears to be no post-2nd century B.C. material. This suggests that this material could belong to a votive deposit relating to one of the sanctuary’s earliest phases, placed intact or semi-intact beyond the sanctuary structures but still within the sacred area delimited by the containing wall.

In the western sector, the opening of a trench parallel to the west side of the portico, on a north-west/south alignment, revealed the western stretch of the containing wall numerous parts of which had been identified previously. The western containing wall was completely exposed and documented. Like the east and north sectors, it was built of large and medium sized roughly-worked stone blocks cut from the bedrock, which outcropped close to the sanctuary area in this part of the site. Indeed, when the temple terrace was created the western side of the containing wall was built directly up against the bedrock.