Columbia subject headings:
Church history--14th century.
Council of Pisa (1409)
Papacy--History--1378-1447.
Schism, The Great Western, 1378-1417.
Harvard subject headings:
Council of Pisa (1409 : Pisa, Italy)
Councils and synods--Italy--Pisa--History.
Papacy--History--1309-1378
Schism, The Great Western, 1378-1417
Princeton subject headings:
Church history--14th century.
Council of Pisa (1409)
Papacy--History--1378-1447.
Schism, The Great Western, 1378-1417.