Columbia subject headings:
Europe--Politics and government--476-1492.
Monarchy--Europe--History.
Queens--Europe--History.
Harvard subject headings:
Europe--History--476-1492.
Middle Ages.
Queens--Europe--History.
Women--History--Middle Ages, 500-1500.
Princeton subject headings:
Europe--Politics and government--476-1492.
Monarchy--Europe--History.
Queens--Europe--History.