This fortress was constructed by the Venetians in the 15th century on the site of a former Byzantine castle. To make it more secure, they made an artificial fosse and thus they separated the fortress from the mainland. The fortress was connected to the land by a movable, wooden bridge. In 1819, the British replaced this bridge with the present stable pathway, which is 60 m long and stands 15 metres above the fosse, locally known as contafossa.