Christ Church Cathedral, Waterford , or more formally, the Cathedral of the Holy Trinity, Christchurch , is a cathedral of the Church of Ireland in Waterford City, Ireland. It is in the ecclesiastical province of Dublin.Former Cathedral of the Diocese of Waterford , it is now one of six cathedrals in the United Dioceses of Cashel and Ossory.
The first church on the site was built in the 11th century. This was replaced in 1210 by a Gothic cathedral. After the Irish Reformation, a new body established by the decree of the Irish Parliament to become the State Church of the Kingdom of Ireland. Church of Ireland, as it was called, is believed to hold the majority of church property (and so retained a large repository of religious architecture and other items, although some later destroyed). The significant majority of the population remained faithful to the Latin liturgy of Roman Catholicism, despite the political and economic benefits of membership in the state church. Christ Church Cathedral was then taken over in this way, Catholic followers were therefore forced to worship elsewhere.
In the 18th century, the city corporation recommended that the bishop build a new building. The architect was John Roberts, who was responsible for a large part of Georgian Waterford. 
During the demolition of the old cathedral, a series of medieval investment was discovered in 1773. They were presented by the then Anglican Bishop, the Rt Revd Richard Chenevix to his Catholic counterpart, the most Revd Peter Creagh, and now kept in the Museum of Treasures Waterford and the National Museum of Dublin. 
The current building has been described by architectural historian Mark Girouard as the finest 18th century church building in Ireland. 
- Michael Boyle (the elder), bishop of Waterford and Lismore (1619-1635)
- Bishop of Waterford
- Bishop of Waterford and Lismore
- Bishop of Cashel and Waterford
- Bishop of Cashel and Ossory
- Dean Waterford
- Jump up ^ Waterford News & Star – Waterford welcomes new Dean
- ^ Jump up to: ab “Christchurch Waterford”. Christchurch Waterford.Retrieved 21 February 2009.
- Jump up ^ Treasures of Britain and the Treasures of Ireland (1st ed.).London: Drive Publications for the Automobile Association. 1968. p. 631st