🇬🇪 Georgia · Submerged site
Dioscurias–Sebastopolis – Milesian Twin Harbour under Sukhumi Bay
Archaic Greek to Byzantine (6th c. BCE – 6th c. CE) · Milesian Greek / Colchian / Roman
Milesian colony 6th c. BCE now –5 to –9 m under Sukhumi Bay — 400-m Hellenistic mole and Roman fortress half under sea promenade.