The Temple of Castor and Pollux or of the Dioscuri is the veritable symbol of Agrigento.
Built during the last decades of the 5C BC, it is dedicated to the twins
born from the union of Leda and Zeus while transformed into a swan.
Four columns and part of the entablature are all that remain of the temple,
which was reconstructed in the 19th century.
http://www.agrigento-sicilia.it/english/valle_dei_templi.htm