A nest of ancient pirates who apparently preyed on Mediterranean shipping for nearly 300 years has emerged during excavations this summer on a remote island off the southeastern tip of the Peloponnese.

According to a Culture Ministry announcement yesterday, archaeologists digging at the ancient city of Antikythera since 2000 have located sanctuaries, a large public building and a wealth of missiles — spear and arrow heads, slingshots and large catapult stones — in the settlement identified as the city of Aegila mentioned in ancient sources. Antikythera controlled the strait between Kythera and western Crete, a crucial passage for shipping.

The site, occupied from the mid-fourth to the mid-first centuries BC, is surrounded by a strong, double enceinte of walls that today reach a maximum height of 5 meters.

“Excavators believe the city may have been a nest of pirates, at a time when piracy was quasi-legitimate,” the ministry said. Archaeologists also located a large boat shed “which protected the constantly war-ready pirate ships.”