Castle of the Knights in Tilos, Greece
The Castle of the Knights is situated on the hill of Agios Stefanos above the main town Megalo Chorio in Tilos. It was built from the Knights of St. John in the 5th century. The castle was built to protect the roads that lead to the fertile plains of the island. Within the walls there was a village constructed to protect the inhabitants from any pirate invasions. Today the outer defensive walls of the castle still remain.