The written history of Abkhazia largely begins with the coming of the Milesian Greeks to the coastal Colchis in the 6th-5th centuries BC. They founded their maritime colonies along the eastern shore of the Black Sea, with Dioscurias being one of the most important principal centers of trade. This city, said to be so named for the Dioscuri, the twins Castor and Pollux of classical mythology, is presumed to have subsequently developed into the modern-day Sukhumi. Other notable colonies were Gyenos, Triglitis, and later Pityus, arguably near the modern-day coastal towns of Ochamchire, Gagra, and Pitsunda, respectively.