The Fortress of Koules was built between 1523 and 1540. It is one of the best-preserved castles of Crete, perched on a small natural elevation where the ruins of an earlier fortress were to be found. It is a massive construction and has 26 chambers on the ground level, situated along a central wide corridor. These rooms were used as living quarters and storage rooms in the Venetian years. During the Turkish occupation period, the Koules was used as a prison for the revolutionaries.
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