The Diocese of Down and Connor, is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Northern Ireland. It is one of eight suffragan dioceses in the ecclesiastical province of the metropolitan Archdiocese of Armagh. Bishop Alan McGuckian is Bishop.

The Archdiocese of Dublin is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church located in the eastern part of Ireland. Its archepiscopal see includes the republic's capital city – Dublin. The cathedral church of the archdiocese is St Mary's Pro-Cathedral. Dublin was formally recognised as a metropolitan province in 1152 by the Synod of Kells. Its second archbishop, Lorcán Ua Tuathail, is also its patron saint.