Christ Church Cathedral, more formally The Cathedral of the Holy Trinity, is the cathedral of the United Dioceses of Dublin and Glendalough and the cathedral of the ecclesiastical province of the United Provinces of Dublin and Cashel in the (Anglican) Church of Ireland.[1] It is situated in Dublin, Ireland, and is the elder of the capital city's two medieval cathedrals, the other being St Patrick's Cathedral.

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]

Christ Church Cathedral is located in the former heart of medieval Dublin, next to Wood Quay at the end of Lord Edward Street. However a major dual carriage-way building scheme around it separated it from the original medieval street pattern which once surrounded it, with its original architectural context (at the centre of a maze of small buildings and streets) lost due to road-building and the demolition of the older residential quarter at Wood Quay. As a result, the cathedral now appears dominant in isolation behind new civil offices along the quays, out of its original medieval context. The cathedral is used as the setting for filming from time to time.

Christ Church is the only one of the three cathedrals or acting cathedrals which can be seen clearly from the River Liffey.

For most of their common history, both Christ Church and St Patrick's held the status of cathedral for the Dublin diocese, a rare arrangement which only ended following the move to disestablish the Church of Ireland. In early times, there was considerable conflict over status but under the six-point agreement of 1300, Pacis Compositio, still extant, an