Develtos

Develtos (, , Δηβελτός, Δεουελτός, Δεούελτος, Διβηλτóς) or Deultum was an ancient city and bishopric in Thrace. It was located at the mouth of the river Sredetska reka on the west coast of Lake Mandrensko, previously part of the Gulf of Burgas, and near the modern village of Debelt.

==History== ===Classical period=== thumb|Hypocaust in Deultum Develton (Thracian: Debelton, "two-swamp area") was founded as an emporium of Apollonia Pontica in the 7th century BC. From the 6th century to the 4th century BC, the settlement served as an important place of trade between Thracians and Greeks.