Columbia subject headings:
Harvard subject headings:
Byzantine Empire--History--Justinian I, 527-565.
Byzantine Empire--History--To 527.
Rome--History--Empire, 284-476.
Princeton subject headings:
Byzantine Empire--History--Justinian I, 527-565.
Byzantine Empire--History--To 527.
Rome--History--Empire, 284-476.
Rome--Politics and government--284-476.
Rome--Social life and customs.