Roman religious architecture dating from the first century, located on the Acropolis with a maximum height of 302 m, which was part of the forum; Is of Corinthian style and of hexastyle-peripteros type, with rectangular plant (25x15m). It was framed by tanks, creating a rare water mirror effect. It must have been dedicated to the imperial cult and not to the goddess Diana, name by which it has been designated from the seventeenth century to the present day (Temple of Diana). It was reused over the centuries, above all, as a municipal butcher (shambles). Its current aspect results from the unwalling works carried in 1870 by Cinatti.