Columbia subject headings:
Harvard subject headings:
Byzantine Empire--Civilization--Congresses.
Byzantine Empire--Relations--Italy--Congresses.
Italy--Civilization--Byzantine influences--Congresses.
Italy--Civilization--Congresses.
Italy--Relations--Byzantine Empire--Congresses.
Princeton subject headings:
Byzantine Empire--Civilization--Congresses.
Byzantine Empire--Relations--Italy--Congresses.
Italy--Civilization--Byzantine influences--Congresses.
Italy--Civilization--Congresses.
Italy--Relations--Byzantine Empire--Congresses.