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The ruined walls of Oia Castle on a rocky headland above white houses, with the sea of the caldera behind.
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logopop · CC BY-SA 3.0 · Source

Oia Castle

Oia Castle is the ruin of the medieval kasteli of Agios Nikolaos on the headland at the western tip of Oia, on Santorini. Under Venetian rule it was one of the island's five fortified settlements and the seat of the Argyri family. Its remaining walls now form a lookout over the caldera, the island of Thirasia and the houses of Oia.

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