Columbia subject headings:
Authority--History--To 1500.
History, Ancient.
Monarchy--History--To 1500.
Harvard subject headings:
Authority--History--To 1500--Congresses.
History, Ancient--Congresses
Monarchy--History--To 1500--Congresses.
Princeton subject headings:
Authority--History--To 1500.
History, Ancient.
Monarchy--History--To 1500.