293 establishments

Yambol ( ) is a city in Southeastern Bulgaria and administrative centre of Yambol Province. It lies on both banks of the Tundzha river in the historical region of Thrace. It is occasionally spelled Jambol.

The Tetrarchy was the system instituted by Roman emperor Diocletian to govern the ancient Roman Empire by dividing it between two emperors, the augusti, and their junior colleagues and designated successors, the caesares. It was kept in place between AD 293 and 324.

thumb|right|300px|Map of the late Roman Diocese of Egypt (Late Antiquity)|Diocese of Egypt, with Thebais in the south. The Thebaid or Thebais (, Thēbaïs) was a region in ancient Egypt, comprising the 13 southernmost nomes of Upper Egypt, from Abydos to Aswan.