An antipope (Latin: antipapa) is a person who, in opposition to the one who is generally seen as the legitimately elected Pope, makes a significantly accepted competing claim to be the Pope, the Bishop of Rome and leader of the Roman Catholic Church. At times between the 3rd and mid-15th century, antipopes were supported by a fairly significant faction of religious cardinals and secular kings and kingdoms. Persons who claim to be pope, but have few followers, such as the modern sedevacantist antipopes, are not classified with the historical antipopes.
At this point, as again in the mid-11th century, we come across elections in which problems of harmonising historical criteria and those of theology and canon law make it impossible to decide clearly which side possessed the legitimacy whose factual existence guarantees the unbroken lawful succession of the successors of Saint Peter. The uncertainty that in some cases results has made it advisable to abandon the assignation of successive numbers in the list of the popes.
Hippolytus of Rome (d. 235) is commonly considered to be the earliest antipope, as he headed a separate group within the Church in Rome against Pope Callixtus I. Hippolytus was reconciled to Callixtus's second successor, Pope Pontian, and both he and Pontian are honoured as saints by the Roman Catholic Church with a shared feast day on 13 August. Whether two or more persons have been confused in this account of Hippolytus and whether Hippolytus actually declared himself to be the Bishop of Rome, remains unclear, since no such claim by Hippolytus has been cited in the writings attributed to him.
Eusebius of Caesarea quotes from an unnamed earlier writer the story of Natalius, a 3rd-century priest who accepted the bishopric of a heretical group in Rome. Natalius soon repented and tearfully begged Pope Zephyrinus to receive him into communion.
Novatian (d. 258), another 3rd-century figure, certainly claimed the See of Rome in opposition to Pope Cornelius, and if Natalius and Hippolytus were excluded because of the uncertainties concerning them, Novatian could then be said to be the first antipope.
The period in which antipopes were most numerous was during the struggles between the popes and the Holy Roman Emperors of the 11th and 12th centuries. The emperors frequently imposed their own nominees to further their own causes. The popes, likewise, sometimes sponsored rival imperial claimants (antikings) in Germany to overcome a particular emperor.
The Western Schism—which began in 1378, when the French cardinals, claiming that the election of Pope Urban VI was invalid, elected Clement VII as Pope—led to two, and eventually three, rival lines of claimants to the papacy: the Roman line, the Avignon line (Clement VII took up residence in Avignon, France), and the Pisan line. The Pisan line was named after the town of Pisa, Italy, where the (Pisan) council had elected Alexander V as a third claimant. To end the schism, in May 1415, the Council of Constance deposed John XXIII of the Pisan line. Pope Gregory XII of the Roman line resigned in July 1415. In 1417, the Council also formally deposed Benedict XIII of Avignon, but he refused to resign. Afterwards, Pope Martin V was elected and was accepted everywhere except in the small and rapidly diminishing area that remained faithful to Benedict XIII. The scandal of the Western Schism created anti-papal sentiment and fed into the Protestant Reformation at the turn of the 16th century.
List of historical antipopes
An asterisk marks those who were included in the conventional numbering of later Popes who took the same name. (The more common case is that the antipope is ignored in later Papal regnal numbers; for example, there was Antipope John XXIII, but the new Pope John elected in 1958 was also called John XXIII.) For the additional confusion regarding Popes named John, see Pope John (numbering). The list of popes and antipopes in the Annuario Pontificio does not include Natalius or Antipope Clement VIII; it may be that Clement's following was considered insignificant.
Sylvester III, sometimes listed as an antipope, appears in the Holy See's Annuario Pontificio as a pope: because of obscurities about mid-11th-century canon law and the historical facts, it expresses no judgement on his legitimacy. The Catholic Encyclopedia places him in its List of Popes, but with the annotation: "Considered by some to be an antipope". Some other sources do classify him as an antipope.
|Pontificate||Common English name||Regnal (Latin) name||Personal name||Place of birth||Age at Election / Death or Resigned||# years as Antipope||Notes||In opposition to|
|c. 200||Natalius||Natalius||Later reconciled (see above)||Zephyrinus|
|217–235||Saint Hippolytus||Hippolytus||Later reconciled with Pope Pontian (see above)||Callixtus I|
|251–258||Novatian||Novatianus||Founder of Novatianism||Cornelius|
|355–365||Felix II*||Felix secundus||Installed by Roman Emperor Constantius II||Liberius|
|Laurentius||Laurentius||Supported by Byzantine emperor Anastasius I||Symmachus|
|767–768||Constantine II||Constantinus secundus||between Paul I and Stephen III|
|768||Philip||Philippus||Installed by envoy of Lombard King Desiderius||Stephen III|
|844||John VIII||Joannes octavus||Elected by acclamation||Sergius II|
|855||Anastasius III Bibliothecarius||Anastasius tertius||Benedict III|
|903–904||Christopher||Christophorus||Between Leo V and Sergius III|
|974||Boniface VII||Bonifacius||Between Benedict VI and Benedict VII|
|984–985||Between John XIV and John XV|
|997–998||John XVI*||Joannes||John Filagatto||Supported by Byzantine emperor Basil II||Gregory V|
|1012||Gregory VI||Gregorius||Benedict VIII|
|1058–1059||Benedict X*||Benedictus||John Mincius||Supported by the Counts of Tusculum||Nicholas II|
|1061–1064||Honorius II||Honorius||Pietro Cadalus||Supported by Agnes, regent of the Holy Roman Empire||Alexander II|
|1080, 1084–1100||Clement III||Clemens||Guibert of Ravenna||Supported by Henry IV, Holy Roman Emperor||Gregory VII|
|1100–1101||Theodoric||Theodoricus||Successor to Clement III||Paschal II|
|1101||Adalbert or Albert||Adalbertus||Successor to Theodoric|
|1105–1111||Sylvester IV||Sylvester||Maginulf||Supported by Henry V, Holy Roman Emperor|
|1118–1121||Gregory VIII||Gregorius||Maurice Burdanus||Gelasius II|
|1124||Celestine II||Cœlestinus||Thebaldus Buccapecus||Honorius II|
|1130–1138||Anacletus II||Anacletus||Pietro Pierleoni||Innocent II|
|1138||Victor IV||Victor||Gregorio Conti||Successor to Anacletus II|
|1159–1164||Victor IV||Victor||Ottavio di Montecelio||Supported by Frederick I, Holy Roman Emperor||Alexander III|
|1164–1168||Paschal III||Paschalis||Guido di Crema|
|1168–1178||Callixtus III||Callixtus||Giovanni of Struma|
|1179–1180||Innocent III||Innocentius||Lanzo of Sezza|
|1328–1330||Nicholas V||Nicolaus||Pietro Rainalducci||Supported by Louis IV, Holy Roman Emperor||John XXII|
|1378–1394||Clement VII||Clemens||Robert of Geneva||Geneva||36/52||15 y, 11 m, 27 d||Avignon||Urban VI|
|1394–1423||Benedict XIII||Benedictus||Pedro de Luna||Illueca, Aragon||66/95||28 y, 7 m, 25 d||Avignon|
|1409–1410||Alexander V*||Alexander||Pietro Philarghi||Pisa||Gregory XII|
|1410–1415||John XXIII||Joannes||Baldassare Cossa||Pisa|
|1423–1429||Clement VIII||Clemens||Gil Sánchez Muñoz||Avignon||Martin V|
|1424–1429||Benedict XIV||Benedictus||Bernard Garnier|
|1430–1437||Benedict XIV||Benedictus||Jean Carrier|
|1439–1449||Felix V||Fœlix||Duke Amadeus VIII of Savoy||Chambéry, Savoy||56/65 (†67)||9 y, 5 m, 2 d||Elected by the Council of Basel||Eugene IV|
Many antipopes created cardinals, known as quasi-cardinals, and a few created cardinal-nephews, known as quasi-cardinal-nephews.
|Giacomo Alberti||Antipope Nicholas V||15 May 1328||Excommunicated by Pope John XXII.|
|Amedeo Saluzzo||Antipope Clement VII||23 December 1383||Abandoned Antipope Benedict XIII after having been deposed by him on 21 October 1408; participated in the Council of Pisa, the election of Pope Alexander V (now regarded as an antipope), the Council of Constance, and the conclave of Pope Martin V.|
|Tommaso Brancaccio||Antipope John XXIII||6 June 1411||Attended the Council of Constance, and the conclave of Pope Martin V.|
|Gil Sánchez Muñoz||Antipope Clement VIII||26 July 1429||Submitted to Pope Martin V after his uncle abdicated.|
Modern claimants to papacy
In modern times various people claim to be pope and, though they do not fit the technical definition of "antipope", are sometimes referred to as such. They are usually leaders of sedevacantist groups who view the See of Rome as vacant and elect someone to fill it. They are sometimes referred to as conclavists because of their claim, on the basis of an election by a "conclave" of perhaps half a dozen laypeople, as in the case of David Bawden ("Pope Michael I"), to have rendered the See no longer vacant. A significant number of these have taken the name "Peter II", owing to its special significance. From the point of view the Roman Catholic Church, they are schismatics, and as such are automatically excommunicated.
- Michel Collin or Colin (Pope Clement XV), self-proclaimed (1950–1974) in France, founder of Order of the Mother of God (a name later changed to Apostles of Infinite Love)
- Jean-Gaston Tremblay, Gregory XVII (1968–2011), in Canada
Palmarian Catholic Church
- Clemente Domínguez y Gómez (Pope Gregory XVII), mystically self-proclaimed (1978–2005) in Spain
- Manuel Corral (Pope Peter II) (2005–11)
- Sergio María (Pope Gregory XVIII) (2011–present)
The Palmarian Catholic Church regards Pope Paul VI, whom they revere as a martyr, and his predecessors as true popes, but hold, on the grounds of claimed apparitions, that the Pope of Rome is excommunicated and that the position of the Holy See has, since 1978, been transferred to the See of El Palmar de Troya.
The following were elected by allegedly faithful Catholics, none of whom was a cardinal:
- Popes of the "Legio Maria", based in western Kenya (not technically Conclavist): Timothy Joseph Blasio Ahitler (1963–1998). Pius Lawrence Jairo Chiaji Adera (1998–2004). Raphael Titus Otieno (2004–present).
- David Bawden (Pope Michael I), (1990–present) elected in Kansas, USA.
- Pope of the "True Catholic Church": Lucian Pulvermacher (Pope Pius XIII), (1998–2009), elected in Montana, USA.
- Mirko Fabris (Pope Krav I), (1978-2012), elected in Zagreb, Croatia. 
- Joaquín Llorens (Pope Alexander IX), (2005–present), elected in Elx, Spain.
- Popes of the "Iglesia Católica Apostólica Remanente", based in Buenos Aires, Argentina: Oscar Michaelli, elected on 24 March 2006 by a group of 34 episcopi vagantes as Pope Leo XIV. On his death on 14 February 2007, he was succeeded by Juan Bautista Bonetti, who took the name of Pope Innocent XIV, but resigned on 29 May 2007. Alexander IX was chosen in his place.
Antipopes have appeared as fictional characters. These may be either in historical fiction, as fictional portraits of well-known historical antipopes or as purely imaginary antipopes.
- Jean Raspail's novels of "L'Anneau du pêcheur" (The Fisherman's Ring), and Gérard Bavoux's "Le Porteur de lumière" (The Light-bringer).
- The fictional synth-pop artist Zladko Vladcik claims to be "The Anti-Pope" in one of his songs.
- Dan Simmons's novels Endymion and Rise of Endymion feature a Father Paul Duré who is the routinely murdered antipope Teilhard I.
- Ralph McInerny's novel The Red Hat features a schism between liberals and conservatives following the election of a conservative African Pope; the liberal faction elect an Italian cardinal who calls himself "Pius XIII".
- In the video game Crusader Kings II by Swedish developer Paradox Interactive, the player may appoint one of their bishops as an antipope.
- "One who opposes the legitimately elected bishop of Rome, endeavours to secure the papal throne, and to some degree succeeds materially in the attempt" (Encyclopædia Britannica: Antipope).
- Annuario Pontificio 2012 (Libreria Editrice Vaticana 2008 ISBN 978-88-209-8722-0), p. 12*
- "The catacombs the destination of the great jubilee". Vatican City. Archived from the original on 10 September 2007. Retrieved 3 September 2007.
- Historia Ecclesiastica, V, 28
- Dictionary of Christian Biography and Literature: Zephyrinus
- "Monarchians – Dynamists, or Adoptionists". Catholic Encyclopedia. Archived from the original on 30 September 2007. Retrieved 3 September 2007.
- Catholic Encyclopedia: Pope Martin V
- CATHOLIC ENCYCLOPEDIA: List of Popes
- Charles William Previté-Orton, The Shorter Cambridge Medieval History (Cambridge University Press 1952, republished 1975 ISBN 0-521-20962-5), vol. 1, p. 477
- Joseph Épiphane Darras, A General History of the Catholic Church, vol. III, p. 58
- Miranda, Salvador. 1998. "14th Century (1303–1404)."
- Miranda, Salvator. 1998. "The Cardinals of the Holy Roman Church: Biographical Dictionary: [Antipope] John XXIII (1410–1415): Consistory of 6 June 1411 (I)."
- Miranda, Salvador. 1998. "15th Century (1404–1503)."
- Code of Canon Law, canon 1364
- 10 Most Bizarre People on Earth
- George D. Chryssides, Historical Dictionary of New Religious Movements (Rowman & Littlefield 2011 978-0-81087967-6)
- Congregación Mercedaria. Esclavas adoratrices del Señor
- Iglesia Católica en el Exilio
- Jean Raspail, "L'Anneau du pêcheur," Paris: Albin Michel, 1994. 403 p. ISBN 2-226-07590-9
- Gérard Bavoux, "Le Porteur de lumière," Paris: Pygmalion, 1996. 329 p. ISBN 2-85704-488-7
- "Zladko "Zlad!" Vladcik's music video, "I am the Antipope""
|Look up antipope in Wiktionary, the free dictionary.|
- Catholic Encyclopedia: "Antipope"
- Encyclopædia Britannica: "Antipope"
- The Pope Encyclopaedia: "Antipope"
- Kelly, J.N.D, The Oxford Dictionary of Popes, Oxford University Press, USA (1 June 1986), ISBN 0-19-213964-9.
- Raspail, Jean, 'L'Anneau du pêcheur, Paris: Albin Michel, 1994. 403 pp. ISBN 2-226-07590-9.
- Bavoux, Gérard, Le Porteur de lumière, Paris: Pygmalion, 1996. 329 pp ISBN 2-85704-488-7.