Columbia subject headings:
Harvard subject headings:
Albertus, Magnus, Saint, 1193?-1280.
Kings and rulers.
Middle age.
Monarchy
Philosophy, Ancient.
Philosophy, Medieval.
Political science--Early works to 1800
Political science--Philosophy
Power (Philosophy)
Thomas, Aquinas, Saint, 1225?-1274
Princeton subject headings:
Geopolitics--Europe.
Nationalism--Europe--History.
Political science--Europe--History--To 1500.