The inner part of the fortress was designated as rooms for the ruling army, arms inventory, and army headquarters. The South side of the fortress has 6 gun holes, facing the harbor entry and in the center - a water container collecting rainwater.
During the Ottoman rule that fortress was used as castle barracks, for the Turkish soldiers, who nicknamed it "Firkas." Today, the fortress is still referred to as Firkas. With the unification of Crete and Greece on the first of December, 1913, the Greek flag was lifted about the guard tower, in a formal military ceremony. Here every year the unification is celebrated.
Today, the fortress entrance is where the Maritime Museum of Chania is located.