Columbia subject headings:
Byzantine Empire--Foreign economic relations--Italy--History.
Italy--Foreign economic relations--Byzantine Empire--History.
Harvard subject headings:
Byzantine Empire--Commerce--Italy--Genoa.
Byzantine Empire--Commerce--Italy--Pisa.
Byzantine Empire--Commerce--Italy--Venice.
Byzantine Empire--Commercial policy--History.
Byzantine Empire--Foreign economic relations--Italy.
Byzantine Empire--Foreign relations--Italy.
Genoa (Italy)--Commerce--Byzantine Empire.
Italy--Foreign economic relations--Byzantine Empire.
Italy--Foreign relations--Byzantine Empire.
Pisa (Italy)--Commerce--Byzantine Empire.
Venice (Italy)--Commerce--Byzantine Empire.
Princeton subject headings:
Byzantine Empire--Commerce--Italy.
Byzantine Empire--Foreign relations--Italy.
Italy--Commerce--Byzantine Empire.
Italy--Foreign relations--Byzantine Empire.