Roman remains can still be found in LOCATION@1 : city walls , the forum -LRB- now ORGANIZATION@1 -RRB- , a theatre , an amphitheatre and the ORGANIZATION@2 -LRB- now transformed into the ORGANIZATION@3 sopra Minerva -RRB- .

They include the walls , the main piazza , and the Temple of the Goddess Minerva , which is now a church called LOCATION@2 sopra Minerva .
