Have you heard about the stamp seal from Karanovo?

Thrace – the Land of Orpheus

The emergence of an elite society in Thrace by the end of the Early Bronze Age was the result of consolidation processes entailing the appearance of Thracian tribal societies. From the 6th century BC onwards the geographic region called by the Hellenes Thrace covered the lands between the Lower Danube in the north and the Aegean in the south, from the Vardar (the Axios) River in the west to Northwest Asia Minor in the east. The lands north of the Danube were also inhabited by Thracians. Their society was tribal in structure and their religious doctrine of royal power assigned the King the role of a mediator between gods and people. The political might of the kings was based on their economic power dependant on the collected taxes and the monopoly on foreign trade. The Thracian rulers lived in fortified settlements and towers remote from the villages of their subjects and called by the authors of Antiquity tursis, as was Seuthopolis, the city of Seuthes III.

In the 7th and 6th centuries BC the Greek colonization spread out over the Thracian coasts and the constant contacts between the Hellenes and the Thracians led to strong mutual influences. The Thracian kings imposed taxes on the colonies but, on their turn, gave them military protection.

The Thracian rulers kept their power and tittles in the lands south of the Danube until 45 AD when the Roman Emperor Claudius annexed the state of the Thracian king Rhoemetalces III and turned it into a Roman province. With the incorporation of the Thracian and Macedonian lands into the Roman Empire the Thracian and Hellenistic culture fell under strong Roman impact.