The Mission, as such, was established by His Grace Christian Lépine, Archbishop of Montreal, the 20^th of June 2014 to serve as the spiritual home for those faithful who wished to celebrate the holy liturgy of the Mass and the other Sacraments according to the liturgical books in vigour prior to the Second Vatican Council. The Mission is designed to be non-territorial and so, extends to the limits of the Diocese of Montreal, thereby providing a place for all the subjects of the Diocese who wish to participate in the ancient rites of the Roman Catholic Church. Nevertheless, other faithful from different dioceses in the surrounding area have also made the Mission their spiritual home whether by a regular Sunday assistance or to celebrate the Sacraments of great occasion (e.g. baptisms, First Communions, Confirmations, marriages). Furthermore, the Mission is also attended by the residents of the neighbourhood who come to the only church in the sector of Saint-Henri (Sud-Ouest borough) in which Mass and offices are celebrated daily .