Great Western Schism By obrooks 1377 Death of Pope Gregory XI 1377 Pope Urban VI elected 1378 Antipope Clement VII elected Period: 1378 to 1389 Pope Urban VI of R Period: 1378 to 1394 Antipope Clement VII of Avignon 1389 Pope Boniface IX elected Period: 1389 to 1404 Pope Boniface IX of R 1394 Antipope Benedict XIII elected Period: 1394 to 1423 Antipope Benedict XIII of Avignon 1404 Pope Innocent VII elected Period: 1404 to 1406 Pope Innocent VII of R 1406 Pope Gregory XII elected Period: 1406 to 1415 Pope Gregory XII of R 1409 Antipope Alexander V elected Period: 1409 to 1410 Antipope Alexander V of P 1410 Antipope John XXIII elected Period: 1410 to 1415 Antipope John XXIII of P Period: 1414 to 1418 Council of Constance 1417 Pope Martin V of R
