Monemvasia is a small historic town in eastern Peloponnese , in the prefecture of Laconia. It is better known by the medieval fortress on the homonym " Rock of Monemvasia " , which is literally a small island connected by a bridge formed in neck total length of 400 meters with the current coastline flat against the city on the Laconian coast . The surviving buildings and structures in the castle include defensive structures of the outer castle and several small Byzantine churches .

The name is a compound word derived from two Greek words alone and Emvasis . Many of the streets are narrow and only suitable for pedestrians. The bay of Old Monemvasia is located in the north. Monemvasia 's nickname is " Gibraltar of the East " because it happens to be out identical to the rock of Gibraltar .