The rocky peninsula Akronafplia was the old acropolis of Nafplio. The Turks used to call it Its-Kale, which means internal castle. It is an oblong peninsula that penetrates the Argolikos bay and connects to the coast in its east side, the pass of Arvanitia. Akronafplia consists of three levels, each one of them was a castle. The fortification of Akronafplia was extended during the possession of the town from the Romans, the Franks, the Venetians and the Turks. During the era of Kapodistrias, there were built a church and a military hospital and the fortification and the armature were fixed. After 1821, it was used as a camp and as a jail.