Columbia subject headings:
Harvard subject headings:
Castile (Spain)--Civilization.
Castile (Spain)--History.
Castile (Spain)--Religion.
Princeton subject headings:
Castile (Spain)--Church history--Congresses.
Castile (Spain)--History--Congresses.
Catholic Church--Spain--Castile--History--Congresses.
Christian life--History--Middle Ages, 600-1500--Congresses.
Monastic and religious life--Spain--Castile--Congresses.