The Temple of Castor and Pollux
The Temple was originally built in 484 BC and rebuilt by Tiberius in 6 AD. Three columns and part of the architrave stand today.
According to Greek and Roman mythology, Castor and Pollux were twin brothers and the sons of Leda and Jupiter). Castor was born mortal and Pollux immortal. They were both excellent horsemen and hunters. The cult of Castor and Pollux came to Italy via Greek influence in the south, where it is first attested around 570-30 BC.