Sedevacantism

Coat of arms used by the Holy See between the death or renunciation of a pope and the election of a new incumbent.

Sedevacantism (from Latin "sede vacante" meaning "the seat being vacant") is a position supported by some traditionalist Catholics, who are critical of the Second Vatican Council and the Vatican II Church and who see the position of pope as vacant since or before the council, with the commonly recognized popes being antipopes.