Saint Patrick's Cathedral in Dublin, Ireland, founded in 1191 as a Roman Catholic cathedral, is currently the national cathedral of the Church of Ireland. Christ Church Cathedral, also a Church of Ireland cathedral in Dublin, is designated as the local cathedral of the Diocese of Dublin and Glendalough.

Dublin is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2022 census, the city council area had a population of 592,713, while Dublin City and its suburbs had a population of 1,263,219, and County Dublin had a population of 1,501,500.