Complex sentence: The term can also relate to a period when Catholicism in Ireland was somewhat divergent from the "Roman" church which, though mostly reconciled with the Synod of Cashel in 1172, some elements unique within the practice of Catholicism and Catholic culture remained in Ireland.
Split into simpler sentences: The term can also relate to a period when Catholicism in Ireland was somewhat divergent from the "Roman" church. Though mostly reconciled with the Synod of Cashel in 1172, some elements unique within the practice of Catholicism and Catholic culture remained in Ireland.