Sedevacantism

Sedevacantism is the belief that the office of Pope is currently vacant. Sedevacantists are radical Catholic traditionalists who insist that recent Popes are heretics for introducing the reforms of Vatican II.

Many often the sedevacantists were originally members of the Society of St. Pius X, but split because they refused to accept John Paul II as pope.

A few sedevacantists have put forward their own Popes in opposition to those of the Roman Catholic church.