What does the author mean when he says that the age of Constantine was "the watershed between the old Roman Empire and the new Byzantine Empire?" Choose 1 Constantine's reign represented a continuation of the Roman Empire, and change happened after his reign. А There is a sharp and clear division between the Roman and Byzantine Empires, marked by Constantine's reign. Constantine's reign came after a long process of separation between the Roman and Byzantine Empires The point of division between the Roman and Byzantine Empires is debated by historians, but the division most likely began during Constantine's reign. 3 of 6