The fort still known with its Turkish name, Firca (Firka = barracks) was built in order to protect the entrance of the harbour. A thick chain from Firca to the base of the light-house closed the harbour in case of siege. The inside area was divided into barracks and ammunition warehouses. Over the door of the first floor there is the following inscription : "ALOYSIUS BRAGADEUS PROVISOR CYDONIAE M. DCXX". Firca was used as military barracks and a prison. The flag of the Unification of Crete to Greece was symbolically raised on the corner watch-tower on 1st December 1913.