The Castle of Oia, also known as the Castle of Saint Nikolas, dates back to the 15th century & was built during the Venetian occupation as a defensive fortress.
Constructed mainly of lava bricks & stones with a volcanic origin on one of the highest spots of the caldera, the ruins of the castle consist of exterior walls that overlook Santorini's cliffs and the sea, cave houses, and other traditional buildings. Most houses have been fully renovated and are used as accommodation facilities. A part of the castle's old watch tower remains intact, although many structures were destroyed due to an earthquake in 1956.
A small chapel that is carved into the volcanic rock and overlooks the Aegean Sea. also lies in the area. It is dedicated to Saint Nikolaos and was constructed around 1450.
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The castle is one of the most famous viewpoints in Santorini, attracting numerous visitors who arrive each evening to watch the most renowned Cycladic sunset and enjoy the romantic atmosphere while gazing at the caldera & the sea.
Tip: Because of the castle's popularity, more often than not, the site can get quite crowded. Make sure you start your walk there at least 1 hour before sunset to make it there on time & get a place. If you would rather avoid crowds altogether, we recommend not visiting the castle around the evening.