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.
Cavan Cathedral
In 1152, the Diocese of Kilmore was formally established by Cardinal Giovanni Paparoni at the synod of Kells. In 1454, Pope Nicholas V gave permission for the ancient church at Kilmore (founded in the sixth century by Saint Felim) to be the cathedral church of Kilmore diocese. It was rebuilt and became to be known in Irish as "An Chill Mhór" (meaning "Great Church") and anglicised as Kilmore, which gave its name to the diocese, a name which has remained ever since. During the Reformation, the Roman Catholic diocese lost possession of the cathedral and all the other temporalities and passed into the hands of the Church of Ireland. Following the completion of the new Anglican cathedral in 1860, the pre-Reformation cathedral became a Church of Ireland parochial hall.