What is the oldest cathedral in Dublin?
Christ Church Cathedral, Dublin
Christ Church is officially claimed as the seat (cathedra) of both the Church of Ireland and Roman Catholic archbishops of Dublin. In law, and in fact, it has been the cathedral of only the Church of Ireland's Archbishop of Dublin since the English Reformation. Though nominally claimed as his cathedral, the Roman Catholic Archbishop of Dublin uses St Mary's in Marlborough Street in Dublin as his pro-cathedral (acting cathedral).[nb 1]