The Roman City of Deultum in Sredets

You're standing at Deultum, the remains of an ancient city right by the village of Debelt. Take a look at the flat, watery land around you. The Thracian name, Debelton, probably meant something like 'the place of two swamps'. The city sat where the Sredetska river flows into Lake Mandrensko, which used to be part of the Gulf of Burgas. So yes, this was a port.