![Aerial view of the old Byzantine Castle in the city of Thessaloniki , Greece. Yedi Koule was the highest security prison until 1989 Stock Photo - Alamy Aerial view of the old Byzantine Castle in the city of Thessaloniki , Greece. Yedi Koule was the highest security prison until 1989 Stock Photo - Alamy](https://c8.alamy.com/comp/TA4212/aerial-view-of-the-old-byzantine-castle-in-the-city-of-thessaloniki-greece-yedi-koule-was-the-highest-security-prison-until-1989-TA4212.jpg)
Aerial view of the old Byzantine Castle in the city of Thessaloniki , Greece. Yedi Koule was the highest security prison until 1989 Stock Photo - Alamy
![Panorama of Thessaloniki from Kastra (castle) with background of Aegean Sea, Greece Stock Photo - Alamy Panorama of Thessaloniki from Kastra (castle) with background of Aegean Sea, Greece Stock Photo - Alamy](https://l450v.alamy.com/450v/2bm2g56/panorama-of-thessaloniki-from-kastra-castle-with-background-of-aegean-sea-greece-2bm2g56.jpg)
Panorama of Thessaloniki from Kastra (castle) with background of Aegean Sea, Greece Stock Photo - Alamy
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