The image shows the Heptapyrgion (also known as Eptapyrgio) and the old town (Ano Poli) in Thessaloniki, Greece. While Heptapyrgion translates to "fortress of the seven towers," the historic castle actually features ten towers built across the Roman, Byzantine, and Ottoman periods. Built during the Byzantine era (with major parts dating to the 12th century), it later served as an Ottoman garrison and-from the late 19th century until 1989-as a notorious prison