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Photo: No machine-readable author provided. Marsyas assumed (based on copyright claims)., CC BY 2.5 via Wikimedia Commons
Medieval fort built by the Ottomans, overlooking the city from Thessaloniki's acropolis. The Greeks converted it into a prison which remained open until 1989.
The Heptapyrgion, modern Eptapyrgio, also popularly known by its Ottoman Turkish name Yedi Kule, is a Byzantine and Ottoman-era fortress situated on the north-eastern corner of the Acropolis of Thessaloniki in Greece.
© OpenStreetMap contributors
Πύργος Τριγωνίου
There is an observation deck just outside the tower, offering great views of the city.
A 14th-century church. Fragments of the church's original wall paintings survive.