Classical antiquity
The Thracians built the first settlements in the area now known as Burgas: the mineral baths of Aqua Calidae and the fortressTyrsis. Under Darius I became part of the Achaemenid Empire, before the Odrysian kingdom was built. Greeks from Apollonia built in area of Sladkite kladenzi (today Pobeda-neighbourhood) a marketplace for trade with the Tracians kings.
During the rule of the Ancient Romans, near Burgas, Colonia Flavia Deultemsium (or Dibaltum, or Develtum) was established as a military colony for veterans by Vespasian. The Romans built the Colonia on the main road Via Pontica. It was the second most important city in the province Haemimontus.
In 376 the Goths destroyed an elite roman company near Develtum.
Bulgarian and Byzantine Middle Ages
In the Middle Ages, there were some important settlements in the area: the fortress Skafida, Poros, Rusokastron, (Battle of Rusokastro), the Baths of the Byzantine, Bulgarian and Ottoman Emperors Aqua Calidae and the a small fortress called Pyrgos was erected where Burgas is today and was most probably used as a watchtower. Under Byzantine Empirebecame an important city on the coast of Black Sea. The Bulgarian ruler Krum built with the Erkesiya a 140 km longer border wall from the Black Sea (near Gorno Ezerovo) to the Mariza River.
1206 the Latin Emperor Henry of Flanders (see Fourth Crusade) destroyed Aquae Calidae, who was now known as the Thermopolis at this time, The Baths was later rebuilt by the Byzantines and Bulgarians again. Poros 1270 was mentioned in a document of the Patriarchate of Constantinople. Close to Poros in 1304 took place the Battle of Skafida, when the Bulgarian Tsar Todor Svetoslav defeated the Byzantines and conquered the southern Black Sea coast.
Beginning of the 13th Century the region was sacked by the Catalan Company. In the 13th Century Burgas is mentioned by the Byzantine poet Manuel Philes in his works as
