Byzantine commonwealth
The term Byzantine commonwealth was coined by 20th-century historian Dimitri Obolensky to refer to the area where Byzantine general influence (Byzantine liturgical and cultural tradition) was spread during the Middle Ages by the Byzantine Empire and its missionaries. This area covers approximately the modern-day countries of Greece, Cyprus, North Macedonia, Bulgaria, Serbia, Montenegro, Romania, Moldova, Ukraine, Belarus, southwestern Russia, and Georgia (known as the region of Eastern Orthodoxy in Europe or the Orthodox Civilization).