Society of Saint Pius X
The Society of Saint Pius X (SSPX; Latin: Fraternitas Sacerdotalis Sancti Pii X, lit. 'Priestly Fraternity of Saint Pius X', FSSPX) is a traditionalist Catholic organization founded in 1970 by Archbishop Marcel Lefebvre. The society is composed principally of priests and seminarians and is associated with a worldwide network of chapels, schools, religious communities, and lay supporters; It is known for its opposition to several reforms associated with the Second Vatican Council.