The Cité Catholique is a Traditionalist Catholic organisation created in 1946 by Jean Ousset, originally a follower of Charles Maurras (founder of the monarchist Action Française in 1899) and Jean Masson (1910–1965), not to be confused (as F. Venner did) with Jacques Desoubrie, who also used the pseudonym Jean Masson. Despite the presence of Roman Catholic clergy in some of its meetings, the Cité catholique is not officially recognised by the Roman Catholic Church.
It first took the name of Oeuvres de la Cité Catholique (Works of the Catholic City) and then of Office international des Oeuvres de formation civique et d'action culturelle selon le droit naturel et chrétien (ICTUS, International Office of Works of Civic Formation and Cultural Action According to Natural Christian Law) before being known under the name Cité Catholique. It is now presided by Jacques Trémollet de Villers, a former associate of the far-right politician Jean-Louis Tixier-Vignancour and former defence attorney for accused war criminal Paul Touvier. The Cité catholique also helped found in 1971 the pro-life NGO Laissez-les-vivre.Jean-Paul Bolufer, a former alumni of the ENA and who was the chief of staff of Christine Boutin, Minister of Housing and the City, before being forced to resign, and close to the Opus Dei, was trained by Cité catholique.
An advance party of the Cité catholique arrived in Argentina in 1958, in the middle of the Algerian War (1954–62) and after the military deposed Juan Perón in 1955. The Cité Catholique brought to Argentina a doctrine of counter-revolutionary warfare and repression against terrorism, justified as part of Thomist dogmatism. They would thus provide the ideological support of the future "Dirty War" carried out by the Argentine military in the 1970s.