Original sentence: By the fifth century, Christendom was divided into a pentarchy of five sees with Rome accorded a primacy.The four Eastern sees of the pentarchy, considered this determined by canonical decision and did not entail hegemony of any one local church or patriarchate over the others.These doctrinal issues were first openly discussed in Photius's patriarchate.Two basic problems — the nature of the primacy of the bishop of Rome and the theological implications of the Filioque — were  involved
Edited sentence: By the fifth century, Christendom was divided into a pentarchy of five sees with Rome accorded the primacy.From the Orthodox perspective, Rome's primacy was determined by canonical decision and did not entail hegemony of any one local church or patriarchate over the others.These doctrinal issues became significant points of contention during Photius's patriarchate.Two basic problems — the nature of the primacy of the bishop of Rome and the theological implications of the Filioque — were involved