Popes and Antipopes By erty Mar 27, 1378 Pope Gregory the XI Died- The Beginning of the Great Schism Apr 8, 1378 Pope Urban VI Elected Period: Apr 8, 1378 to Oct 15, 1389 Pope of Rome Urban the VI Sep 20, 1378 Antipope of Avignon Clemtent VII Elected Period: Sep 20, 1378 to Sep 16, 1394 Antipope of Avignon Clement VII Nov 2, 1389 Pope Boniface Elected Period: Nov 2, 1389 to Oct 1, 1404 Pope of Rome Boniface IX Sep 28, 1394 Antipope of Avignon Benedict XIII Period: Oct 11, 1394 to Mar 12, 1403 Antipope of Avignon Benedict XIII Oct 17, 1404 Pope Innocent VII Elected Period: Oct 17, 1404 to Nov 6, 1406 Pope of Rome Innocent VII Nov 30, 1406 Pope Gregory XII Elected Period: Nov 30, 1406 to Jul 4, 1415 Pope of Rome Gregory XII Jun 26, 1409 Antipope of Pisa Alexander V Elected Period: Jun 26, 1409 to May 3, 1410 Antipope of Pisa Alexander V May 25, 1410 Antipope of Pisa John XXIII Elected Period: May 25, 1410 to Jul 4, 1415 Antipope of Pisa John XXIII Nov 14, 1417 Pope Martin V Elected- End of the Great Schism