Pope Gregory XII
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Pope Gregory XII, born Angelo Corraro, Corario, or Correr, was head of the Catholic Church from 30 November 1406 to 4 July 1415. Reigning during the Western Schism, he was opposed by the Avignon claim
Portrait of Gregory XII as Gregory I by van Gent and Berruguete (c. 1476, Ducal Palace, Urbino)
Antipope John XXIII
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Baldassarre Cossa was Pisan antipope as John XXIII during the Western Schism. The Catholic Church today regards him as an antipope in opposition to Pope Gregory XII, whom it recognizes as the rightful
Miniature from the Chronicle of the Council of Constance by Ulrich of Richenthal
Tomb of Antipope John XXIII