The remains of the ancient town can be visited
Ancient City Ostia-Capitolium

The Capitolium in Ostia was once a central structure in the forum of the ancient port city of Ostia. It represented a religious center and was an architectural element that shaped the city's main street.
History+
The Capitolium was erected around 120 AD under Emperor Hadrian, as evidenced by stamped bricks. It was a Roman podium temple, standing on a high base accessible via 22 steps, covering a ground area of 35 by 15.5 meters. This elevated position might have symbolized the Capitoline Hill in Rome. The temple's front was adorned with six columns. The cella behind the columnar facade contained a large room with three smaller cells at the back wall, possibly dedicated to the Capitoline Triad – Jupiter, Juno, and Minerva – although this is not definitively proven.
Image: http://de.wikipedia.org/wiki/Datei:Capitolium_Ostia_Antica_2006-09-08_n1.jpg
Location: 41.7545, 12.2880