Original sentence: A subject of the Byzantine Empire, during the Middle Ages.Byzantine usually refers to the eastern segment of the Roman Empire, known as the Byzantine Empire, which survived into the Medieval period.Byzantinism, a modern comparison to the complexity of the political apparatus of their empire
Edited sentence: A subject of the Byzantine Empire, during the Middle Ages, surviving nowadays in Orthodox Christian Church and the modern Greek national and historical ideas.Byzantine usually refers to the eastern segment of the Roman Empire, known as the Byzantine Empire, which survived into the Medieval period (330-1453 AD) and is connected directly with the modern Greeks