Great Western Schism By TheRealPerry 1377 Death of Pope Gregory XI. 1378 Pope Urban VI Elected 1378 Antipope Clement VII Elected Period: 1378 to 1394 A. Clement VII Period: 1378 to 1389 R. Urban VI 1389 Pope Boniface IX Elected Period: 1389 to 1404 R. Boniface IX 1394 Antipope Benedict XIII Elected Period: 1394 to 1423 A. Benedict XIII 1404 Pope Innocent VII Elected Period: 1404 to 1406 R. Innocent VII 1406 Pope Gregory XII Elected Period: 1406 to 1415 R. Gregory XII 1409 Antipope Alexander V Elected Period: 1409 to 1410 P. Alexander V 1410 Antipope John XXIII Elected Period: 1410 to 1415 P. John XXIII