Its affiliation is Roman Catholic and it is administered under the Diocese of Montreal by La Paroisse Sainte-Geneviève de Pierrefonds, founded by Antoine Faucon[1] in 1741.

In 1731 the Société de Saint-Sulpice (Sulpician Order of priests), a Catholic mission in Quebec, granted the first concession of territory to be apportioned to the Paroisse Sainte-Geneviève, one of eighteen parishes that occupied, by 1834,[2] the Island of Montreal.

In 1843, Louis-Marie Lefèvre, the fifth priest of the parish from 1828 to 1872, undertook the promoting of a new church and commissioned Québécois architect Thomas Baillargé (1791–1859) to begin work on a layout.

The facade was finished in dimension stone and capped off by two silver spires, or flèches,[4] that towered 34 metres (111 feet) above the ground.

The crypt, which lies on a foundation measuring a thickness of 90 centimetres (3 feet), contains the remains of Louis-Marie Lefèvre, church founder, who was laid to rest there in 1972.