Great Schism Timline By bthimeschstpats Dec 30, 1370 Pope Greagory XI Period: Dec 30, 1370 to Mar 27, 1378 Pope Greagory XI Apr 8, 1378 Pope Urban VI Period: Apr 8, 1378 to Oct 15, 1389 Pope Urban VI Sep 20, 1378 Antipope Cleament VII Period: Sep 20, 1378 to Sep 16, 1394 Antipope Clement VII Nov 14, 1378 Start of Great Western Schism Nov 2, 1389 Pope Boniface IX Period: Nov 2, 1389 to Oct 1, 1404 Pope Boniface IX Sep 28, 1394 Antipope Benedict XIII Period: Sep 28, 1394 to May 23, 1423 Antipope Benedict XIII Oct 17, 1404 Pope Innocent XII Nov 6, 1406 Pope Innocent XII Nov 30, 1406 Pope Gregory XII Period: Nov 30, 1406 to Jul 14, 1415 Pope Gregory XII Jun 16, 1409 Antipope Alexander V May 3, 1410 Antipope Alexander V Nov 14, 1410 Antipope John XXIII Period: Nov 14, 1410 to Nov 15, 1415 Antipope John XXIII Nov 14, 1414 End Of Great Western Schism Nov 14, 1414 Start of Council of Constance Nov 14, 1417 Pope Martin V Period: Nov 14, 1417 to Feb 20, 1431 Pope Martin V Nov 14, 1418 End of council of Constance
