Columbia subject headings:
Europe--History--476-1492.
France--History--Louis IX, 1226-1270.
Louis IX, King of France, 1214-1270.
Harvard subject headings:
Europe--History--476-1492.
France--History--Louis IX, 1226-1270.
Louis IX, King of France, 1214-1270
Princeton subject headings:
Europe--History--476-1492.
France--History--Louis IX, 1226-1270.
Louis IX, King of France, 1214-1270.