The remains of the ancient town can be visited
Tempio di Ercole Vincitore
The Tempio di Ercole Vincitore, also known as the Round Temple by the Tiber, is an ancient structure in Rome. It is considered the oldest surviving marble building in the city.
History+
This temple was built around 120 BC, likely commissioned by the oil merchant Marcus Octavius Herrenus. Originally dedicated to Hercules, the structure was converted into a church dedicated to Saint Stephen in 1132. This conversion significantly contributed to its preservation. In the 17th century, it was renamed Santa Maria del Sole, and its architecture served as inspiration for numerous Renaissance builders.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://it.wikipedia.org/wiki/File:Tempuio_di_Ercole_Vincitore.JPG
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 41.8887, 12.4808