Cathedral of the Blessed Sacrament, Christchurch

The Cathedral of the Blessed Sacrament (popularly known as the Christchurch Basilica) was a Catholic cathedral located in the city centre of Christchurch, New Zealand. It was the mother church of the Roman Catholic Diocese of Christchurch and seat of the Bishop of Christchurch.

Designed by architect Francis Petre, it was generally held to be the finest renaissance-style building in New Zealand. On 7 April 1983, the building was registered as a Category I heritage item by the New Zealand Historic Places Trust, with the registration number 47. It was regarded as an outstanding example of church architecture in Australasia and was regarded as Petre's best design.

The cathedral was closed after the 4 September 2010 Canterbury earthquake. The February 2011 Christchurch earthquake collapsed the two bell towers at the front of the building and destabilised the dome. The dome was removed, and the rear of the cathedral was demolished.

The decision to demolish the cathedral was made public on 4 August 2019. Demolition work was completed in 2021. On 7 December 2019, the Catholic Bishop of Christchurch, Paul Martin, announced that a new $85 million cathedral was to be completed by 2025 and would accommodate up to 1,000 people. It would be built adjacent to Victoria Square. These plans proved controversial and resulted in an appeal by a group of parishioners to the Vatican's Supreme Tribunal of the Apostolic Signatura in 2023. The Signatura subsequently ruled that the appeal would not have jurisdiction over the Cathedral replacement process. Following further consultation about the project, Bishop Michael Gielen announced in December 2023 that reinstatement of the Cathedral at the previous Barbadoes Street site is now the most preferred option, with a final decision to be made in March 2024.