St Patrick's Cathedral, Dublin
Saint Patrick's Cathedral () in Dublin, Ireland, founded in 1191, is the National Cathedral of the Church of Ireland. With its spire, St. Patrick's is the tallest church (not Cathedral) in Ireland and the largest. Christ Church Cathedral, also a Church of Ireland cathedral in Dublin, is designated as the local Cathedral of the diocese of Dublin and Glendalough.
Roman Catholic Diocese of Dromore
During the 16th century Reformation, the Roman Catholic Church lost control of the old cathedral in Dormer to the Protestant Church of Ireland, which was wholly destroyed during the rebellion of 1641 and rebuilt twenty years later. In the 19th century, the Roman Catholic Church chose the site of a new cathedral at Newry, the largest town of County Down, and a place of great historical interest, situated at the head of Carlingford Lough. Work for building of Newry Cathedral begun in 1823 and was completed in 1829 by Dr. Michael Blake (bishop of Dromore 1833–1860) who had been Vicar-General of Dublin and the restorer of the Irish College at Rome. This cathedral was enlarged and beautified by Bishop Henry O'Neill, who succeeded Bishop Thomas MacGivern in 1901.