Born to the nobility.
Uncle of PopeAlexander VI.
Lawprofessor at Lleida.
Diplomat for the royal court of Aragon.
Initially supported anti-pope Benedict XIII, but he reconciled with the lawful Church, and helped Alfonso V bring the kingdom of Aragon back to orthodoxy.
Bishop of Valencia in 1429.
Created cardinal in 1444 by PopeEugene IV.
209th Pope in 1455, he was considered a comprise candidate, was very elderly at the time of election, in poor health, and though he was known as a pious man with lofty goals, he had little skill for the office.
He preachedCrusade to re-take Constantinople from the Turks, the topic that would consume most of his papacy.
He sent missionaries and nuncios throughout Europe to gather support and arrange logistics, but to little effect.
There was little support from any level of the laity for foreign adventuring; conflicts raged throughout Europe for local reasons.
Though papal forces won the field at Belgrade on 22 July1456, their general died of natural causes, and the little support waned.
Disputes over the Crusade continued for years, with some priests refusing to collect the papal tax to support it, and decisions for or against it entering into local politics.
Callistus became involved in a nepotism scandal when he made two nephews cardinals and a third the Duke of Spoleto, Italy.
Ordered the posthumous re-trial of SaintJoan of Arc, at which she was acquitted.
Though he spent largely on art for the Vatican, he spent little time concerned with the Humanists and writers of his day, many of whom turned against him.