The Great Western Schism By confrazzled56 Jan 11, 1377 Pope of Rome; Gregory XI dies Gregory XI dies. Jan 11, 1378 Pope of Rome: Urban VI Jan 11, 1378 Antipope of Avignon: Clement VII Period: Jan 11, 1378 to Jan 11, 1389 R. Urban VI Period: Jan 11, 1378 to Jan 11, 1417 Great Western Schism Period: Jan 11, 1378 to Jan 11, 1394 AA. Clement VII Jan 11, 1389 Pope of Rome: Boniface IX Period: Jan 11, 1389 to Jan 11, 1404 R. Boniface IX Jan 11, 1394 Antipope of Avignon: Benedict XIII Period: Jan 11, 1394 to Jan 11, 1423 AA. Benedict XIII Jan 11, 1404 Pope of Rome: Innocent VII Period: Jan 11, 1404 to Jan 11, 1406 R.Innocent VII Jan 11, 1406 Pope of Rome: Gregory XII Period: Jan 11, 1406 to Jan 11, 1415 R. Gregory XII Jan 11, 1409 Antipope of Pisa: Alexander V Period: Jan 11, 1409 to Jan 11, 1410 AP. Alexander V Jan 11, 1410 Antipope of Pisa: John XXIII Period: Jan 11, 1410 to Jan 11, 1415 AP. John XXIII Period: Jan 11, 1414 to Jan 11, 1418 Council of Constance Jan 11, 1417 Pope of Rome: Martin V Elected. End of Schism Martin V elected. End of Schism.