Original: The Byzantine Empire (or Byzantium) was the predominantly Greek-speaking eastern part of the Roman Empire throughout Late Antiquity and the Middle Ages. Also known as the Eastern Roman Empire, the Byzantine Empire was called simply Roman Empire (Greek:, Basileia RhÅ maiÅ n) or Romania (, RhÅ manÃ a) by its inhabitants and neighbors.
Simplified: The Byzantine Empire (or Eastern Roman Empire) was the name of the Greek part of the Roman Empire which survived into the Middle Ages.