Seuthopolis (Ancient Greek: Σευθόπολις) was an ancient hellenistic-type city founded[2] by the Thracian king Seuthes III, and the capital of the Odrysian kingdom. The city was founded sometime from 325 BC to 315 BC.[3] It was a city, built on the site of an earlier settlement, and its ruins are now located at the bottom of the Koprinka Reservoir near Kazanlak, Stara Zagora Province, in central Bulgaria.