Columbia subject headings:
Harvard subject headings:
Byzantine Empire--Commerce--History--Congresses.
Byzantine Empire--History--Palaeologi dynasty, 1259-1448--Congresses.
Money--Byzantine Empire--History--Congresses.
Princeton subject headings:
Byzantine Empire--Commerce--History--Congresses.
Byzantine Empire--History--Palaeologi dynasty, 1259-1448--Congresses.
Money--Byzantine Empire--History--Congresses.