The White Tower
Thessaloniki's symbol, the White Tower, was built in the 15th century as a coastal defense tower. It originally linked the city's east and south walled perimeter, which was demolished in 1866. For centuries it was used both as guards' quarters and as a prison. Today, it houses a museum with various collections of icons, frescoes and other artefacts, most of them dating from the Byzantine era.
The Arch of Galerius ( Kamara )
Built a little before 305 AD in commemoration of Galerius' victory over the Persians in 297 AD. It stands at the junction of Egnatia and D Gounari Streets.
A circular building erected in 306 AD as the Pantheon or Mausoleum of Galerius. Under Theodosius the Great it became a Christian church, with only a few additions or alterations. Its mosaics are unique for the era (4th century). Located on D Gounari Street.
A large, early Christian church built in the 5th century with mosaics of astounding beauty and harmony of colour. Located on Agia Sophia Street.
The Old Walls
Erected under Theodosius the Great, they encircled the medieval city.
In the Upper Town. Celebrated for its Ecumenical Foundation for Patriarchal Studies, the only one in the world. Its church is cruciform in plan with a dome (14th century).
Restored in 1948, after having been destroyed by the great fire in 1918, to conform with its original plan as a five-aisled basilica. The church was built on top of the old Roman baths and is decorated with mosaics.
An 8th-century building representing a transition from the domed basilica towards the cruciform plan with dome - superb mosaics.
More Information from the Perfecture of Thessaloniki