The author tries to point out characteristic features and general trends of the Greek colonization of the North-Western Pontic area. The study of Eastern Greek ceramics from Olbia made it possible to date its foundation to 620/610–590 BC. Yet it is well-known that the temporary emporion of Borysthenes was founded in the third quarter of the 7th century BC, about thirty years earlier than the city of Boristhenes. Observing the dynamics of the development of Olbia and Borysthenes one can see that both the city areas, their necropoleis and the surrounding territory developped simultaneously in both cases, the process resulting in the appearance of the Polis of Olbia which included the sea emporion Borysthenes. The same pattern seems to have worked in the case of the Istrian polis consisting of two towns, Istria and Orgame (Argamum), founded in about the same order. Development of poleis including two settlements founded very closely in time is also to be seen at the end of the archaic period, if one comes to think of Niconium and Orphiussa/Tyras in the Low Dniester Area or Kerkinitis and the Pre-Chesonesus settlement in Western Taurica. This could be a model of developing a new community realized in the North-Western Black See area.