The Society of Saint Pius X is a society of priests within the Roman Catholic Church rather than a separate denomination but that claim is not recognized by the Vatican. Like the Traditionalist movement, the Society was created in opposition to changes that were made during the Second Vatican Council. The Society was founded by Archibishop Marcel Lefebvre, a priest of the Holy Ghost Order, who had been bishop of Dakar before returning to France as bishop of Tulle in 1962. A vocal opponent of the modernization that was going on within the Roman Catholic Church at the Second Vatican Council, he resigned as head of the Holy Ghost Order rather than implementing the changes that the Council asked. He established a seminary that he named the Society of Saint Pius X the following year, named for the first pope of the 20th century to be canonized, and a key figure in resisting secularization and liberalism in France. Initially supported by the Vatican, it was suppressed in 1975. In defiance of the Vatican, Lefebvre ordained twelve traditionalist priests over the following year. The chief focus of the work of the Society is to promote the traditional Latin mass. In the view of the Society of Saint Pius X, the decrees of the Second Vatican Council corrupted the Church and the papacy. Through a grassroots campaign, priests of the Society of Saint Pius X attempt to liberate parishes from the modern mass, restoring the pre-Vatican II liturgy. Several chapels have been founded by the Society. Strongest in France, Argentina and Africa, membership in the Society is growing within the United States. As the Society does not view itself as a separate church, it does not maintain membership records, but it operates several primary schools, a college, a seminary, retreat centers and its publishing house, Angelus Press. Formed in 1983, the Society of Saint Pius V broke away from the SSPX over liturgical issues, and represents a stronger break with Rome than its predecessor.
 
 
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Founded by Archbishop Marcel Lefebvre in 1970, the Society’s chief objective is the formation of priests using the methods that the Church as always used, including the Holy Sacrifice of the Mass, the Mass of All Time, the preaching of the Catholic faith and Catholic morals, the endowment of grace through the administration of the sacraments of the Catholic Church, and Catholic doctrine drawn from the best sources.
http://fsspx.org/en
Society of Saint Pius X, District of Australia
Archibishop Marcel Lefebvre established the Society of St. Pius X with the approval of Rome and according to the dictates of Canon Law, its purpose being the formation of priests in a manner untainted by any trace of modern errors in doctrine, morals or worship. The work and activities of the Society in Australia are described here, including parish bulletins and Society schools, organizations, and retreats.
http://www.sspx.com.au/
Society of Saint Pius X, District of the USA
The SSPX is an international priestly society of common life without vows, whose purpose is to train, support and encourage priests to effectively spread the Catholic faith throughout the world. Designed to operate much like a missionary order, the apostolate seeks to draw people closer to Christ through the Holy Sacrifice of the Mass, through its preaching, schools, seminaries, and other houses of religious formation, which are highlighted here.
http://sspx.org/en
The Society of Saint Pius V is an organization of traditional Catholic priests who are dedicated to the preservation of the traditional Latin Mass. Refusing to offer the Novus Ordo Missae, the priests offer the traditional Latin Mass exclusively, according to the prescribed rites prior to the changes made by the Vatican II Council. Its organizational structure, locations, seminary, and positions are stated.
http://www.sspv.org/
Society of St. Pius X in New Zealand
In keeping with the traditions of the Catholic Church, the priests of the Society of St. Pius X celebrate the immemorial Mass of St. Pius V, also known as the Tridentine Mass. The work and activities of the Society in New Zealand is elaborated here, including a calendar of events, mass centers, schools, youth groups and other facilities. Its Third Orders are also described, and contacts are posted to the site.
http://www.sspx.org.nz/