Sedevacantismus
Sedevacantismus est sententia theologica in quam transeunt quidam "Catholici traditionalistici," qui credunt Sanctam Sedem esse vacantem post Papam Pium XII mortuum, anno 1958, et recentes papas Ioannem XXIII, Paulum VI, Ioannem Paulum I, Ioannem Paulum II, Benedictum XVI et Franciscum papas legitimos non esse.

 Concilium Vaticanum Secundum
 Missa Pauli VI
 Missa Tridentina
 Sedevacantistus antipapa
 Sirianismus

Nexus externi

Situs sedevacantismo faventes
Sedevacantism Reconsidered
Roman Catholic Traditionalism? Sedevacantism.
Brief Overview of Situation w/images
Evidence of sedevacantism
Further explanation of sedevacantism
The Aquinas site. Sedevacantist.com.
list of sites
Trytek, Raphael. De sedevacantismo.
"Eclipse of the Church."
WFTS radio SSPV sermons, lectures, music
SSPV
Most Holy Family Monastery
The Society of the Immaculata

Iudicia
 Friedl, Phil. "You cannot be a Sedevacantist forever."
 Fulham, Terence. "Sedevacantism refuted."
 Harrison, Brian. "White smoke? Valid Pope."
 Michael, Jacob. "Sedevacantism: a return to Protestant roots." 
 Michael, Jacob. "Pope or Heretic?  An evaluation of Benedict XVI."
 Nichols, Wayne. "Against the Sedevacantist."
 Sungenis, Robert. "Against Sedevacantism: Discussion with the Dimond Brothers."
 Sungenis, Robert. "The insanity of sedevacantism."
 De sedevacantismp ab SSPX
 Is that Chair Vacant? De sedevacantismp a Society of St. Pius X Canadae.
 "Do-It-Yourself Popes: the Wacky World of Sedevacantists."
 "A Prescription Against 'Traditionalism' Part 3: A Refutation of the Heresy of Sedevacantism."

Ecclesia Catholica
Haeresis