Antipope

Antipope is a term of the Roman Catholic Church in the context of its official list of popes.^[1] An antipope is not included in the list of popes in the Vatican's annual directory, Annuario Pontificio^[2]

An antipope is a pretender who falsely claims to be pope or who wrongly opposes the legitimate and recognized pope.^[3]

The existence or claims of an antipope produces a schism in the Roman Catholic Church. A conflict is caused by those who are opposing the authority of the pope.^[4]

List of antipopes (Mercati's List)[5]

Coat of Arms	Antipope	Image	Latin Name	Secular Name	Place of Birth	Pontificate	Age
	Hippolytus		Hippolytus		Asia Minor, Roman Empire (Turkey)	217–235	III
	Novatian		Novatianus			March 251 – 258
	Felix II		Felix Secundus			355 – 22 November 365	IV
	Ursinus		Ursinus			September 366 – November 367
	Eulalius		Eulalius			27 December or 29 December 418 – 3 April 419	V
	Laurentius		Laurentius			1) 22 November 498 – February 499 2) 501–505
	Dioscorus					22 September 530 – 14 October 530	VI
	Theodorus		Theodorus			687	VII
	Paschal		Paschalis			687
	Constantine II		Constantinus Secundus			5 July 767 – 6 August 768	VIII
	Philip		Philippus			31 July 768
	John VIII		Ioannes Octavus			January 844	IX
	Anastasius III		Anastasius Tertius			August 855 – September 855
	Christopher		Christophorus		Rome, Papal States (Italy)	July or September 903 – January 904	X
	Boniface VII Again		Bonifacius Septimus	Franco	Italy	August 984 – July 985
	John XVI		Ioannes Sextus Decimus	John Philagathus (Filogatos)	Rossano, County of Calabria (Italy)	April 997 – February 998
	Gregory VI		Gregorius Sextus			1012	XI
	Benedict X		Benedictus Decimus	Giovanni Mincius	Rome, Papal States (Italy)	5 April 1058 – 24 January 1059
	Honorius II		Honorius Secundus	Peter Cadalus	Rome, Papal States (Italy)	28 October 1061 – 1064/1072
	Clement III		Clemens Tertius	Wibert of Ravenna	Parma, Holy Roman Empire (Italy)	1) 26 June 1080 2) 24 May 1084 – 8 September 1100
	Theodoric		Theodoricus			September 1100 – January 1101	XII
	Albert		Albertus		Italy	February – March 1102
	Sylvester IV		Silvester Quartus	Maginulf	Germany or Italy	18 November 1105 – 12 April 1111
	Gregory VIII		Gregorius Octavus	Maurice	Limousin, Kingdom of France (France)	8 March 1118 – April 1121
	Anacletus II		Anacletus Secundus	Pietro Pierleoni OSB	Rome, Papal States (Italy)	14 February 1130 – 25 January 1138
	Victor IV		Victor Quartus	Gregorio de Ceccano	Ceccano, Papal States (Italy)	March 1138 – 29 May 1138
	Victor IV		Victor Quartus	Ottaviano de Monticello	Rome, Papal States (Italy)	7 September 1159 – 20 April 1164
	Paschal III		Paschalis Tertius	Guido di Crema	Crema, Holy Roman Empire (Italy)	22 April 1164 – 20 September 1168
	Callistus III		Callistus Tertius	Giovanni de Struma OSB	Tuscany, Holy Roman Empire (Italy)	September 1168 – 29 August 1178
	Innocent III		Innocentius Tertius	Lando de Sittino	Lazio, Papal States (Italy)	29 September 1179 – January 1180
	Nicholas V		Nicolaus Quintus	Pietro Rainalducci OFM	Borgorose, Italy	May 12, 1328 –August 25, 1330	XIV
	Clement VII		Clemens Septimus	Robert of Geneva	Geneva, Holy Roman Empire (Switzerland)	September 20, 1378 – September 16, 1394
	Benedict XIII		Benedictus Tertius Decimus	Pedro de Luna	Illueca, Spain	September 28, 1394 – July 26, 1417
	Alexander V		Alexander Quintus	Pietro Philarghi OFM	Crete, Republic of Venice (Greece)	June 26, 1409 – May 3, 1410	XV
	John XXIII		Ioannes Vicesimus Tertius	Baldassare Cossa	Naples, Kingdom of Naples (Italy)	May 17, 1410 – May 29, 1415
	Felix V		Felix Quintus	Amadeus VIII	Chambéry, Duchy of Savoy (France)	November 5, 1439 – April 7, 1449