GREGORY XII. (Angelo Coriaro or Correr), pope from Nov. 3o, 1406, to July 4, 1415, was born of a noble family at Venice about 1326. Successively bishop of Castello, Latin patriarch of Constantinople, cardinal-priest of San Marco, and papal secre tary, he was elected to succeed Innocent VII. under the express condition that, should the antipope Benedict XIII. at Avignon re nounce his claim, he also would renounce his, so that the long schism might be terminated. As pope, he concluded a treaty with his rival at Marseilles, by which a general council was to be held at Savona in Sept. 1408, but King Ladislaus of Naples brought the negotiations to nought. Gregory had promised not to create more cardinals, and when he did so, in 1408, his former cardinals de serted him and, with the Avignon cardinals, convoked the council of Pisa, which proclaimed in July 1409 the deposition of both popes and the election of Alexander V. Gregory, still supported by Naples, Hungary, Bavaria, and by Rupert, king of the Romans, found protection with Ladislaus, and in a synod at Cividale del Friuli banned Benedict and Alexander. John XXIII., having suc ceeded to the claims of Alexander in 141o, concluded a treaty with Ladislaus, by which Gregory was banished from Naples on Oct. 31, 1411. The pope presented his resignation to the council of Constance on July 4, 1415, and died at Recanati on Oct. 18, 1417.