Not to be confused with the city by the same name, and lying at an elevation of almost 290 metres, Larissa represents the Acropolis of Argos. Not to be confused with the city by the same name, and lying at an elevation of almost 290 metres, Larissa represents the Acropolis of Argos, possibly named after the ancient Pelasgos’ daughter. Protecting the entrance to the plain of Argolis, this natural fort was not surprisingly used by the Romans, Byzantines, Franks, Venetians and Ottomans. There are four cisterns and a wall from more recent years around the acropolis, which used to be surrounded by older Cyclopean walls. This is where history and mythology start blending. An underground passage some 3,000 steps in length lies under Larissa, with two caves. The church of Agia Marina from 1859 AD was constructed on the remnants of the temple of Zeus of Larissa. Another church on the slopes of Larissa, that of Panagia Katakekrymmeni, is built near where the ancient temples of Athena Oxyderkis and Pythaeus Apollo are. The ancient sanctuary of Acraia Hera is also visible at Larissa, so the temple of Apollo, considered the first to be first built by Pythaeus of Delphi.