Thessaloniki, Greece- July 24, 2018: The ancient walls of the castle and Trigonion Tower in the old city Ano Poli in Thessaloniki, Greece. - Stock Photo & Image

Thessaloniki, Greece- July 24, 2018: The ancient walls of the castle and Trigonion Tower in the old city Ano Poli in Thessaloniki, Greece.

Thessaloniki, Greece- July 24, 2018: The ancient walls of the castle and Trigonion Tower in the old city Ano Poli in Thessaloniki, Greece.

Thessaloniki, Greece- July 24, 2018: Aerial view of Thessaloniki from the ancient walls of the castle and Trigonion Tower in the old city Ano Poli.

Thessaloniki, Greece- July 24, 2018: Street view and urban architecture in old city of Thessaloniki, the second largest city of Greece located on the northern coast of the Aegean Sea.

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Thessaloniki, Greece- July 24, 2018: The ancient walls of the castle and Trigonion Tower in the old city Ano Poli in Thessaloniki, Greece.

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Thessaloniki, Greece- July 24, 2018: Aerial view of Thessaloniki from the ancient walls of the castle and Trigonion Tower in the old city Ano Poli.

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Athens, Greece - 25 Nov 2021: Typical buildings in the streets of Plaka district in Athens, the Greek capital.

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Thessaloniki, Greece- July 24, 2018: The ancient walls of the castle and Trigonion Tower in the old city Ano Poli in Thessaloniki, Greece.