John XXIII entered the Curia during the Western Schism. Pope Boniface IX made him cardinal in 1402. From 1403 to 1408 he served as papal representative in Bologna. In an attempt to save the church through unity and reform, the cardinals convened the Council of Pisa which declared both Gregory and Benedict deposed, and elected Antipope Alexander V—whom John XXIII succeeded in 1410.
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