Francis William Petre (27 August 1847 – 10 December 1918), sometimes known as Frank Petre, was a New Zealand-born architect based in Dunedin. He was an able exponent of the Gothic revival style, one of its best practitioners in New Zealand. He followed the Catholic Church's initiative to build places of worship in Anglo-Saxon countries inspired by Romance forms of architecture. His basilica Cathedral of the Blessed Sacrament, in Christchurch was demolished in 2021.