The Archdiocese of Dublin, , is a Roman Catholic archdiocese in eastern Ireland centred on the republic's capital city – Dublin. The archdiocese is led by the Archbishop of Dublin, who serves as pastor of the mother church, St Mary's Pro-Cathedral and Metropolitan of the Metropolitan Province of Dublin. It was formally recognised as a metropolitan province in 1152 by the Synod of Kells. Its second archbishop, Lorcán Ua Tuathail (Anglicised as St Laurence O'Toole), is also its patron saint.