The area above the amphitheatre, next to Villa Virgiliana, revealed the entire opus incertum wall, founded on an earlier course of tufa blocks, that was perhaps the enclosure of the Roman sanctuary. The opus reticulatum structures built into the northern side of Villa Virgiliana belonging to the tetrastyle tempietto, excavated in 1842 and described by Beloch, were also part of the sanctuary. The abandonment of the cult area was marked by the necropolis which was positioned there between the 1st and 2nd century A.D. and remained in use until at least the early medieval period.

The exploration of a stretch of the outer ring of the amphitheatre brought to light, still in situ, the tufa blocks that may have supported the velarium. This phase was later obliterated by the enlargement of the structure and the addition of another sector, the maenianum summum, identified in previous excavation campaigns. Of the latter another tract with relative access stairway was uncovered.