Free Walking Sightseeing Tour #5 in Thessaloniki Municipal Unit, Greece

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. Despite its name, which in both languages means "Fortress of Seven Towers", it features ten, and was probably named after the Yedikule Fortress in Constantinople. It served as the major redoubt of the city's acropolis, as well as the seat of its garrison commander in Ottoman times, until the late 19th century. It was then converted to a prison, which remained open until 1989. References to the infamous Yedi Kule prison abound in the Greek rebetika songs. Restoration and archaeological work began in the 1970s and continues to this day.

Wikipedia: Heptapyrgion (Thessaloniki) (EN)

The Church of Prophet Elijah is a 14th-century church in Thessaloniki, Greece, and a UNESCO World Heritage Site.

Wikipedia: Church of Prophet Elijah (Thessaloniki) (EN)

The Church of Saint Demetrius, or Hagios Demetrios, is the main sanctuary dedicated to Saint Demetrius, the patron saint of Thessaloniki, dating from a time when it was the second largest city of the Byzantine Empire. Since 1988, it has been on the UNESCO World Heritage List as a part of the site Paleochristian and Byzantine monuments of Thessaloniki.

Wikipedia: Hagios Demetrios (EN)

The Roman Forum of Thessaloniki is the ancient Roman-era forum of the city, located at the upper side of Aristotelous Square.

Wikipedia: Roman Forum (Thessaloniki) (EN)

The Monastir Synagogue is a historic synagogue of the once vibrant Jewish community in Thessaloniki.

Wikipedia: Monastir Synagogue (Thessaloniki) (EN)

The Church of Saint Catherine is a late Byzantine church in the northwestern corner of the Ano Poli, Thessaloniki, Greece.

Wikipedia: Church of Saint Catherine, Thessaloniki (EN)

The Church of the Holy Apostles is a 14th-century Byzantine church in the northern Greek city of Thessaloniki. Because of its outstanding Byzantine mosaics and architecture, and its testimony to the importance of Thessaloniki in early and medieval Christianity, the church is inscribed on the UNESCO World Heritage List along with other Paleochristian and Byzantine monuments of Thessaloniki.

Wikipedia: Church of the Holy Apostles (Thessaloniki) (EN)