The Great Western Schism By hazerdheart Jan 11, 1377 Pope of Rome Gregory XI dies Jan 11, 1378 Pope of Rome Urban VI Period: Jan 11, 1378 to Jan 11, 1389 R. Urban VI Jan 12, 1378 Antipope of Avingnon Clement VII Period: Jan 12, 1378 to Jan 12, 1394 A. Clement VII Jan 11, 1389 Pope of Rome Boniface IX Period: Jan 11, 1389 to Jan 11, 1404 R. Boniface IX Jan 12, 1394 Antipope of Avingnon Benedict XIII Period: Jan 12, 1394 to Jan 12, 1423 A. Benedict XIII Jan 11, 1404 Pope of Rome Innocent VII Period: Jan 12, 1404 to Jan 12, 1406 R. Innocent VII Jan 11, 1406 Pope of Rome Gregory XII Period: Jan 12, 1406 to Jan 12, 1415 R. Gregory XII Jan 12, 1409 Antipope of Pisa Aleander V Period: Jan 12, 1409 to Jan 12, 1410 P. Alexander V Jan 12, 1410 Antipope of Pisa John XXIII Period: Jan 12, 1410 to Jan 12, 1415 P. John XXIII Period: Jan 13, 1414 to Jan 13, 1418 The Council of Constance Jan 11, 1417 Pope of Rome Martin V elected, end of schism