Heptapyrgion of Thessalonica, Thessaloniki

The Heptapyrgion of Thessalonica, also known as the Yedi Kule, is a medieval fortress located in the center of Thessaloniki. It was built in the 14th century and served as a prison for many years. Today, it serves as a museum and is a popular destination for tourists interested in medieval history. Visitors can explore the fortress and learn about its history and its role in the city's past.