The Basilica Holy Mother Eleusa is situated on the northern side of the peninsula. It was built in the 6th century. It is a three-nave church with three more apses and a nartex. The two side aisles have two smaller apses pointing the North and to the South. The northern part and the central nave have sunk in the sea. The basilica is 28 m long and 18 m wide. In 1920, excavations and studies started here. Now it is well preserved and partly restored.
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