Koules Fortress
The "Castello a Mare" is a fortress located at the entrance of the old port of Heraklion, Crete, Greece. It was built by the Republic of Venice in the early 16th century. The fortress was completed in 1540. In 1630, the fort was armed with 18 cannons on the ground floor, and 25 cannons on the pathway leading to the roof. During the 21-year long Siege of Candia (Heraklion), Ottoman batteries easily neutralized the fort's firepower. The Ottomans eventually took the fort in 1669, after the Venetians surrendered the entire city. The fortress has been restored, and it is now open to the public. Art exhibitions and cultural activities are occasionally held at the fort.