Deultum thrived during the reign of the Severan Dynasty (r. 193-235 AD), at the end of the 2nd and the beginning of the 3rd century AD, when it had an area of about 250 decares (app. 62 acres), and a sophisticated urban infrastructure. Its residents had temples of ancient god of medicine Asclepius and goddess Cybele, and also worshiped the Thracian Horseman, also known as god Heros, and Hercules (Heracles). In the second half of the 3rd century AD, Deultum was ransacked by the Goths; however, it was restored shortly after that. The city’s thermae (public baths) were re-built with a complex water supply and sewerage system, and a hypocaust (underfloor heating). It is possible that during a visit to Deultum in November 296 AD Roman Emperor Diocletian also visited the thermae. In the 4th century, the city was known again with its Thracian name, Develt, and it was reinforced because of its new strategic role of supplying and protecting the new capital of the Roman Empire, Constantinople (as of 330 AD). In the 370s, there was a major battle near Develt between the Roman forces and the Goths who prevailed and burned down the city. It was restored once again but on a smaller area. In the 5th century, Develt was the center of a bishopric.