The modern boundaries of Thrace in Bulgaria, Greece, and Turkey.The physical–geographical boundaries of Thrace: the Balkan Mountains to the north, the Rhodope Mountains (highlighted) and the Bosporus.The Roman province of Thrace c. 200 ADThe Byzantine thema of Thrace.Map of Ancient Thrace made by Abraham Ortelius in 1585, stating both the names Thrace and Europe.Thrace and the Thracian Odrysian Kingdom under Sitalces c. 431–424 BC, showing the territories of several Thracian tribes.Thrace in the Odrysian Kingdom showing several Thracian tribes. Sapeia was Northern Thrace and Asteia was Southern Thrace.