The Seminary of Our Lady, Co-Redemptorix is one of five major Seminaries managed by the Society of Saint Pius X.
It is located near Buenos Aires in La Reja, Argentina. It started out as a house in Buenos Aires and served as a minor seminary for the Year of Spirituality in 1979. A year later, a property was purchased in La Reja and the building started in 1981. Construction was finished only three years later and the first priests formed at La Reja were ordained in December of 1985. Since then it has continued to serve as a place of formation for sacerdotal aspirants from South America, Mexico, and Central America. Currently, it houses 6 professors and approximately 45 seminarians.