Antipope
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A false claimant of the Holy See in opposition to a pontiff canonically elected. At various times in the history of the Church illegal pretenders to the Papal Chair have arisen, and frequently exercised pontifical functions in defiance of the true occupant. Hergenröther enumerates thirty in the following order:
- Hippolytus (?), III century
- Novatian, 251
- Felix II, 355-365
- Ursicinus, 366-367
- Eulalius, 418-419
- Laurentius, 498-501
- Constantine II, 767
- Philip, VIII century
- Anastasius, 855
- Leo VIII, 956-963
- Boniface VII, 974
- John XVI, X century
- Gregory, 1012
- Sylvester III, 1044
- Benedict X, 1058
- Honorius II, 1061-72
- Guibert or Clement III, 1080-1100
- Theodoric, 1100
- Aleric, 1102
- Maginulf, 1105
- Burdin (Gregory VIII), 1118
