Thessaloniki has many treasures, including a castle called Eptapyrgio or Yedi Kule. Eptapyrgio is located on the hill of the old town of Ano Poli and has a unique view of the city, the port, and the Aegean Sea.
Eptapyrgio was built during the Byzantine period and includes a Byzantine castle and Peridromo. The castle walls date back to the fourth century AD. However, a few years after the Ottomans conquered the city; several more towers were added to the fort with the renovation of several towers. The new towers of the castle are called Eptapyrgio, which means seven towers (although the castle has 10 towers).
Skyros Castle is located at the highest point of the city of Skyros with a view of the land and the sea. This castle has a long and noisy history and its construction dates back to the Byzantine era. Its architecture is simple and inside is a monastery of Agios Georgios, founded in the 10th century.
Fortezza in Rethymno was built by Crete to protect the city and port of Rethymno from the Turks.
The castle is shaped like a star and has three gates and six cylinders or watchtowers. The castle was heavily damaged by the Ottomans in 1646 during the Second and Fifth Wars of the Venezuelan Ottoman Army, after which St. Nicholas Catholic Church, located inside the castle, became a mosque. For a long time, many of the inhabitants still lived in the castle, but in the twentieth century, the city expanded and its inhabitants moved out of the castle. Even if you do not enjoy archeology, you cannot miss the magnificent view of the castle from the city.