The independent fortress of Eptapyrgio used to be the citadel of Thessaloniki. It was the bastion of defense as the entire citadel housed both Eptapyrgio and a separate system of towers, gates and walls. Eptapyrgio was preserved by the Ottomans after the fall of the city in 1430 but it acquired a terrible reputation when it began being used as a prison. It became known as the notorious prison of Yedi Kule, a place of confinement and martyrdom throughout the 20th century.
Today, the place has been restored and preserved. It also offers a beautiful view of the whole city.
