Sedevacantism

Sedevacantism is the position, held by a small group of Traditionalist Catholics,^[1]^[2] that the person in the papal see right now is not truly pope and that, for lack of a catholic pope, the see has been empty since the death of Pope Pius XII in 1958.

↑ Appleby, R. Scott (1995), Being Right: Conservative Catholics in America, Indiana University Press, p. 257, ISBN 978-0-253-32922-6.
↑ Marty, Martin E; Appleby, R. Scott (1994), Fundamentalisms Observed, University of Chicago Press, p. 88, ISBN 978-0-226-50878-8.

[IUP-1] Appleby, R. Scott (1995), Being Right: Conservative Catholics in America, Indiana University Press, p. 257, ISBN 978-0-253-32922-6.

[UCP-2] Marty, Martin E; Appleby, R. Scott (1994), Fundamentalisms Observed, University of Chicago Press, p. 88, ISBN 978-0-226-50878-8.

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[2]