Original sentence: Following the Great Schism of 1054, Eastern Christianity diverged from Western Christianity; the allegiance of Irish Christians remained with the Patriarch of the West
Edited sentence: By the 11th century, the Gregorian Reforms had realigned the Irish Church with Roman policies and other continental norms.By the advent of the Norman Invasion of Ireland orthodoxy was already being supplanted distinctly by Roman Catholicism, sealed by the invasion itself.Christianity spread throughout the island in the fifth and sixth centuries.Following the Great Schism of 1054, Eastern Christianity diverged from Western Christianity