Columbia subject headings:
Castile (Spain)--Foreign relations.
Church history--Middle Ages, 600-1500.
Conciliar theory--History.
Council of Basel (1431-1449 : Basel, Switzerland)
Council of Basel (1431-1449 : Basel, Switzerland)--History--Sources.
Europe--History--15th century.
Harvard subject headings:
Castile (Spain)--Relations--Europe.
Church history--Middle Ages, 600-1500
Conciliar theory--History.
Europe--History--15th century.
Europe--Relations--Spain--Castile.
Princeton subject headings:
Castile (Spain)--Foreign relations.
Church history--Middle Ages, 600-1500.
Conciliar theory--History.
Council of Basel (1431-1449)
Council of Basel (1431-1449)--History--Sources.
Europe--History--15th century.