Columbia subject headings:
Harvard subject headings:
Charlemagne, Emperor, 742-814.
France--History--To 987.
France--Kings and rulers--Biography.
Holy Roman Empire--History--To 1517.
Holy Roman Empire--Kings and rulers--Biography.
Princeton subject headings:
Charlemagne, Emperor, 742-814.
France--History--To 987.
Holy Roman Empire--History--To 1517.
Holy Roman Empire--Kings and rulers--Biography.