- Greek empire (1204-1461) on the SE coast of the Black Sea
- seaport in NE Turkey: former capital of the empire of Trebizond
- A former Greek empire occupying much of the southern coast of the Black Sea. It was founded as an offshoot of the Byzantine Empire in 1204 and retained its autonomy until it was conquered by Ottoman Turks in 1461.
- See Trabzon.