Arch of Galerius and Rotunda
Thessaloniki Municipality, Greece
The Arch of Galerius or Kamara and the Rotunda of Galerius are neighbouring early fourth-century AD monuments in the city of Thessaloniki, in the region of Central Macedonia in northern Greece. As an outstanding example of early Byzantine art and architecture, in addition to the importance of the rotunda as one of the earliest Christian monuments in the Eastern Roman Empire, both sites were inscribed on UNESCO's World Heritage List in 1988 as part of the Paleochristian and Byzantine monuments of Thessaloniki.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).