Great Western Schism -Gianna By Gianna_Leland Mar 27, 1378 Pope Gregory XI dies Sep 16, 1378 Antipope of Avignon, Celment VII Elected Period: Sep 16, 1378 to Sep 16, 1394 Antipope Clement VII Oct 15, 1378 Pope of Rome Urban VI Elected Period: Oct 15, 1378 to Apr 8, 1389 Pope Urban VI Oct 1, 1389 Pope of Rome Boniface IX, Elected Period: Oct 1, 1389 to Nov 2, 1404 Pope Boniface IX Nov 25, 1394 Antipope of Avignon, Benedict XIII Elected Period: Nov 25, 1394 to Jan 11, 1423 Antipope Benedict XIII Nov 6, 1404 Pope of Rome Innocent VII, Elected Period: Nov 6, 1404 to Oct 17, 1406 Pope Innocent VII Elected Period: May 13, 1406 to Oct 18, 1415 Pope Gregory XII Oct 18, 1406 Pope of Rome, Gregory XII Elected Period: May 3, 1409 to Jun 26, 1410 Antipope Alexander V Jun 26, 1409 Antipope of Pisa, Alexander V Elected Period: Jan 10, 1410 to Dec 27, 1415 Antipope John XXIII Dec 22, 1410 Antipope of Pisa, John XXIII, Elected