 Under Byzantine rule it was part of the theme of Hellas, and later of the theme of the Peloponnese.In the aftermath of the Fourth Crusade, the Crusaders captured the castle built on Larisa Hill, the site of the ancient acropolis, and the area became part of the lordship of Argos and Nauplia.In 1388 it was sold to the Republic of Venice, but was taken by the Despot of the Morea Theodore I Palaiologos before the Venetians could take control of the city; he sold it anyway to them in 1394.