Columbia subject headings:
Civilization, Medieval.
Communication--Political aspects--Holy Roman Empire--History--To 1500.
Heralds--Holy Roman Empire--History--To 1500.
Holy Roman Empire--Court and courtiers--History--To 1500.
Holy Roman Empire--Kings and rulers--To 1500.
Harvard subject headings:
Civilization, Medieval
Communication--Political aspects--Holy Roman Empire--History--To 1500.
Heralds--Holy Roman Empire--History--To 1500.
Holy Roman Empire--Court and courtiers--History--To 1500.
Holy Roman Empire--Kings and rulers
Princeton subject headings:
Civilization, Medieval.
Communication--Political aspects--Holy Roman Empire--History--To 1500.
Heralds--Holy Roman Empire--History--To 1500.
Holy Roman Empire--Court and courtiers--History--To 1500.
Holy Roman Empire--Kings and rulers--History--To 1500.