Fragments of transport amphorae dating to the Classical and Hellenistic periods from the Aegean and Black Sea regions were retrieved during Tundzha Regional Archaeology Project (TRAP) field survey in the Yambol province. Despite poor preservation, 13 diagnostic sherds from Chios, Heraclea Pontica, Thasos, and Lesbos were identified.
Another 20 sherds can be ascribed to unidentified production centres located on the southern coast of the Black Sea and the northern Aegean. The presence of imported amphorae indicates that regional trade routes reached inland Thrace between the late sixth and late third centuries BC.