Today, there remains a cavea and tier of seats of the ancient theatre, several arches of loggias and some important remains of the stage. A profound restoration was began at the beginning of the XX century.
The renaissance convent of St. Gerolamo is located alongside the theatre. The convent hosts the Archaeological Museum and offers a fascinating visit on the river and to the city.
Architecture and Art. On the right of the wall there are the remains of the monumental eastern entrance, with its wide staircase that leads to the upper orders. The Roman Postumia Bridge was in correspondence with this entrance. The bridge apparently collapsed in the XI century.
The western entrance, which also has a wide stairway, corresponded more or less with the Stone Bridge.
Between the two entrances and bridges there was the theatre, rich with statues and marble, decorated with loggias and porticoes and with large semicircular tiers of seats climbing up the side of the hill.
It reflected the architectural canons pertinent to such buildings: the semicircular caveo or tier of seats reserved for spectators, the orchestra at the foot of the tier, the stage or scenic building, reserved for the actors.
The scenic building was developed with a backstage, scenery front and stage.
In the theatre area parts of the architectural decoration of the building are located, in addition to the inscriptions and monuments in Roman marble, mostly coming from the city and territory.