Kilitbahir Castle (Turkish: Kilitbahir Kalesi) is a fortress on the west side of the Dardanelles, opposite the city of Çanakkale, where there is a corresponding fortress (Kale-i Sultaniye), from which Çanakkale takes its name.

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The two castles were constructed by Fatih Sultan Mehmet in 1463 to control the straits at their narrowest point. Kilitbahir's name, meaning "lock of the sea", reflects this defensive purpose.

Turkish version of the