 In 320 BC, Seuthes III moved the Odrysian kingdom to central Thrace and built his capital city at Seuthopolis (Kazanlak, present day Bulgaria).In 313 BC he supported Antigonus I in the latter's war against Lysimachus, occupying the passes of Mount Haemus against his overlord but was again defeated and forced to submit.The Tomb of the Thracian King Seuthes III is situated in Bulgaria in the Golyamata Kosmatka mound, at a distance of 1 km south from the town of Shipka north from the town of Kazanlak (Bulgaria).