Foro Romano

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

It is a large two-terraced forum^[1] featuring two-storey stoas, dug up by accident in the 1960s. The forum complex also boasts two Roman baths,^[2] one of which has been excavated while the other is buried underneath the city, and a small theater which was also used for gladiatorial games. Although the initial complex was not built in Roman times, it was largely refurbished in the 2nd century.^[2] It is believed that the forum and the theater continued to be used until at least the 6th century.

source https://en.wikipedia.org/wiki/Roman_Forum_(Thessaloniki)