Columbia subject headings:
Holy Roman Empire. Bulla Aurea.
Harvard subject headings:
Charles IV, Holy Roman Emperor, 1316-1378
Constitutional history--Holy Roman Empire
Electors (Kurfürsten)
Germany--History--Charles IV, 1347-1378
Holy Roman Empire--History--Charles IV, 1347-1378
Holy Roman Empire--Kings and rulers--Election
Holy Roman Empire--Law and legislation.
Holy Roman Empire--Politics and government
Holy Roman Empire. Bulla Aurea.
Princeton subject headings:
Holy Roman Empire. Bulla Aurea