During the 2015 season, two trenches were opened in the central area of the ancient municipium, close to the Romanesque parish church of San Cassiano in Pitino.

Trench 1 was opened facing the medieval church, immediately west of one excavated in 2014 in which the remains of Roman structures and several late antique tombs were present. The new trench revealed a section of Roman wall built of irregular cobblestones, preserved at foundation level, and several fragments of architectural terracottas (plaques from a frieze with rosettes and triglyphs). The latter probably belonged to a Republican cult building that must have been situated on the site of the present church, on the highest point of the plateau on which the city of Pitinum Pisaurense stood.

Trench 2 was opened immediately north of the basalt-paved road skirting the church that was uncovered during the 1990s. During these excavations, the area adjacent to the road was partially investigated and only the late medieval stratigraphy was documented. The area was cleared and the subsequent excavations exposed the layers relating to the abandonment of the Roman municipium and the reoccupation of the site with temporary structures.

In the northern part of the trench a circumscribed layer of stones and brick was found, and nearby in the north-eastern part, two isolated lumps of reddened baked earth were uncovered. South of the trench, four stones placed on edge lined a post-hole, which cut an underlying layer of black sandy-clay soil which extended uniformly across the entire trench, from the basalt road to the north end of the excavation.
In addition to post-holes, two pits were identified, one circular filled with yellow lime mortar and gravel, and the other sub-circular filled with a layer of scattered stones.