Thracians already featured in the epics of Homer, which were settled in the 2nd millenium BC. Occasional references to them appear the following centuries, although it was not until the 5th century when Greek literature developed an interest in discussing non-Greeks more extensively. In the 7th and 6th centuries, much of the Thracian coast was settled by Greek colonists who founded numerous towns, like Thasos, Byzantion or Odessos. The political history of the Thracian tribes of this age is virtually unknown, although it is recorded that in the late 6th century, Athenian settlers interacted with a "king of Thrace" (and possible predecessor of the Odrysian kings?) residing north of the Chersonese peninsula. The absence of imported artefacts confirms that inland Thrace north of the Rhodopes remained largely isolated from the Aegean trade until the late 6th century.