There were some changes and continuities in the political construction in the mediterranean world from 200-1000 A.D. The Byzantine Empire was the eastern continuation of the Roman Empire after the Western Roman Empire fall in the fifth century CE. It lasted from the fall of the Roman empire until the Ottoman conquest in 1453 .
There some changes that occured in the Byzantine Empire in terms of the political system like, Byzantine Empire Shifted its capital from Rome to Constantinople, changed the official religion to Christianity, and changed the official religion to Christianity, and changed the language from latin to Greek, but still there were some continuities like byzantines initially maintained many Roman system of governance and law and aspects of Roman culture. The Byzantines called themselves “Roman”. The term “Byzantine Empire” was not used until well after the fall of the empire.
Christianity was an integral component of Byzantine governance, Justinian wanted the Roman empire to reach heights of glory as Christian empire confessing orthodox faith. Byzantine leaders maintained and built upon the legacy of their Roman successor, but added a new Christian character.
Through the Byzantine empire shared some features in common with the roman empire , it differed most significantly in its religious character and urban center.