The major temple of Aquinum, better known as the “so-called Capitolium” was one of the largest buildings in the city. The remains are located in the northwest of the colony, in a peripheral area. The temple was built on a pre-existing cult certainly the oldest, pre-Roman times.
According to the most recent studies, the ” so-called Capitolium” was a temple with six columns on the front, with two architectonical orders of architecture, Doric and Corinthian. The monument is dated between the end of II century B.C., and the early decades of I centuryB.C.
The temple was probably dedicated to a female deity (perhaps Juno Regina Populonia), linked to healing sphere.