But though the Eastern and Western empires were broken apart, the Church was one.  The Greeks, indeed, found fault with the Romans for putting three words into the Creed of Nicea which had not been decided on by the consent of the whole Church in Council, and there was a question between the Pope of Rome and the Patriarch of Constantinople as to which had the chief rule.  At last their disputes in the eleventh century caused a schism, or ruling apart, and the Greek Church became separated from the Roman Church.