In 2001 work was undertaken in three trenches: trench P, situated in the pars postica of temple B; trench G, in the area in front of the temple; trench V in the southern excavation area.

Trench P, which had already been excavated in the 1980s, was re-opened with the aim of finding, below the wall of a late medieval tower, the northeastern face of the wall which originally constituted the front of the late archaic temple and was subsequently (end of the 3rd century B.C.) incorporated into temple B as a closing wall of the cella. This hypothesis was formed on the basis of the orientation of the medieval wall which diverged from that of contemporary structures and was aligned instead with the Etruscan buildings. It was also so supported by the fact that several blocks were incorporated into the south-west face of the same wall which do not conform to medieval norms and are comparable with those in the foundations of one of the perimeter walls of the late archaic temple. The excavation identified the part of the medieval tower below which was the structure relating to one of the long sides of late archaic temple A.

Excavations in trench G, in the area in front of temple B (where earlier campaigns had identified an external floor level relating to the temple and a step from the stairway), revealed a stratigraphic sequence which from the mid 3rd century B.C. went back as far as an artificial fill datable to the end of the 5th century B.C. This fill was probably part of the re-organization of the area around the late archaic temple.

Trench V was situated in the area in front of a wall belonging to a service building on a north-south alignment in the southern area of the excavation. Its foundation relates to the cult pools of the 3rd century B.C. found in previous years. The deposit, situated outside the building, revealed a stratigraphy relating to layers of collapse from the structure dating to the 2nd century B.C. and relates to the construction in this part of the sanctuary of the late temple A. An external floor level dating to the end of the 3rd century B.C. was also uncovered. (MiBAC)