Columbia subject headings:
Byzantine Empire--Civilization--Roman influences--Congresses.
Europe--Civilization--Roman influences--Congresses.
Rome--Civilization--Congresses.
Harvard subject headings:
Byzantine Empire--Civilization--Roman influences--Congresses.
Rome--Civilization--Congresses.
Princeton subject headings:
Byzantine Empire--Civilization--Roman influences--Congresses.
Europe--Civilization--Roman influences--Congresses.
Rome--Civilization--Congresses.