👉 Graeco-Byzantine Empire, also known as Byzantium, was a major political and cultural entity in ancient Rome, spanning from the 5th century AD to the 9th century AD. It was centered around the city of Constantinople (modern-day Istanbul) and its surrounding territories, including modern-day Turkey, Greece, and parts of Europe. The term "Graeco-Byzantine" refers to the cultural and political influence it exerted on these regions.