Simplify the following text for a Grade 10 native English-speaking person.
Original: Just as the Byzantine empire represented the political continuation of the Roman Empire , Byzantine art developed out of the art of the Roman empire , which was itself profoundly influenced by ancient Greek art .
Simplified: Byzantine art means the art of the Eastern Roman Empire from about the 5th century until the Fall of Constantinople in 1453 . ( The Roman Empire during this period is conventionally known as the Byzantine Empire . )