There are indications that river trade between the Northern Aegean and Central/Eastern Thrace is a phenomenon which started probably already in the Early Bronze Age and probably continued till the end of the 19th century. However, most evidence comes from the Late Bronze age, the Early Iron Age and the Hellenistic period. During this last period, there is also strong evidence for Greek settlements in Thracian territory. This trade was profitable for both Greek traders and local Thracian aristocracy.
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