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.
Christ Church Cathedral, Dublin
Christ Church also contains the largest cathedral crypt (63.4m long) in Britain or Ireland, constructed in 1172-1173. Having been renovated in the early 2000s, it is now open for visitors.