The Roman Catholic Church slowly developed during this time. In 344 the Council of Sardica established the court of appeals and allowed the Bishop of Rome to claim some primacy. Then the Council of Constantinople in 381agreed that the Bishop of Rome did have authority.
The great iconoclastic controversy occurred in 731-32 and the Roman Catholic Church split over the use of icons. The Roman Catholic Church kept icons while the Eastern Orthodox Church did not (depending on the ruler). Today both churches have icons. Continue reading