During a competition for a project to remodernise the piazza trial trenches were dug in the northern part of Piazza 1 Ottobre. These revealed the foundations of a Republican amphitheatre, demolished to make room for the Imperial version which must have had a much larger space in front of it. The Republican construction obliterated, without completely destroying, several pre-Roman tombs datable to between the 6th-4th century B.C. which had been identified during earlier investigations. A lead fistula, resting directly on the cut structures and appearing to head towards a well, can be dated to the Imperial period. Each length of pipe bore the stamp M. AVREL. LVCRETIVS LYSIAS CVR. AQ.

The structures found towards the east dated to the Lombard period (7th-8th century A.D.). These comprised a well and the foundations of small rooms situated on the edge of a beaten earth road which crossed the piazza in a north-east/south-west direction, a different alignment from that of the Roman structures.

At the centre of the piazza a tile production installation dating to the 17th century was found, with a large well preserved kiln, settling tanks and a well.

Lastly, along the southern side of the enclosure which marked the change in height between the road and the area open to the public, the remains were uncovered of what was probably a corridor on two levels ( porticus or ambulatio), in part identified in the 1950s, built in opus latericius, continued in opus vittatum, with an opus signinum floor.