Columbia subject headings:
Byzantine Empire--History--527-1081--Congresses.
Byzantine Empire--History--To 527--Congresses.
Italy--Antiquities, Byzantine--Congresses.
Italy--History--476-774--Congresses.
Harvard subject headings:
Princeton subject headings:
Byzantine Empire--History--527-1081--Congresses.
Byzantine Empire--History--To 527--Congresses.
Italy--Antiquities, Byzantine--Congresses.
Italy--History--476-774--Congresses.