They exported grain and slaves to Byzantium and beyond -- a pattern that continued in various forms until the eighteenth century AD .
Greeks ( c 650BC - 370AD ) : From the seventh century BC the Greeks founded colonies around the Black Sea .
Greeks exported grain and slaves to Byzantium and beyond -- a pattern that continued in various forms until the eighteenth century AD .
Greeks ( c 650BC - 370AD ) : From the seventh century BC the Greeks founded colonies around the Black Sea .