Martin V. also known as Oddone Colonna was elected Pope in 1417.

He was recognized by almost the entire kingdom. But Jean IV, Count of Armagnac, continued to have negotiations with the anti-pope, Benedict XIII, who on October 27, 1418, retired to the rock of Peñiscola, and who had accorded to the Count and his family a series of spiritual favors.

In 1420 the rupture was complete. Upon the death of Benedict XIII in 1424, Jean IV of Armagnac supported Gilles Munoz, who took the title of Clement VIII.

Reigned from 1417-1431. He rattified the Council of Constance in 1418 and punlished seven Reforms dealing with taxation and abuse of Papal provisions.

Created cardinal by Pope Innocent VII. Attended and supported the decisions of the Council of Pisa during the Great Schism. His election by the conclave at the Council of Constance ended the Schism. Though offered many other lodgings, Martin established his papacy in Rome, and worked to rebuild it and the Papal States.

To restore Church unity and papal prestige, he made concordats with various rulers, and denounced the theory that councils are supreme in the Church, an idea that had gained popularity at Pisa and Constance. An attempt to prolong the schism was made in Spain by the followers of Antipopes Benedict XIII and Clement VIII, but by 1429 they had run out of followers or supporters.
Birth 1368 in Rome, Italy. He died in 1431