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
Pope Martin V
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Pope Martin V, born Oddone Colonna, was the head of the Catholic Church and ruler of the Papal States from 11 November 1417 to his death in February 1431. His election effectively ended the Western Sc
Detail of a fresco in the Museum of the Hospital of Santa Maria Nuova by Lorenzo di Bicci, showing Martin V consecrating the Church of Sant'Egidio, c. 1424
Pope Martin's election is announced. Chronicle of Ulrich of Richenthal.