Columbia subject headings:
Byzantine Empire--Relations--Kievan Rus.
Byzantine Empire--Relations--Russia.
Italy--Relations--Russia.
Kievan Rus--Relations--Byzantine Empire.
Russia--Relations--Byzantine Empire.
Russia--Relations--Italy.
Harvard subject headings:
Byzantine Empire--Relations--Kievan Rus.
Byzantine Empire--Relations--Russia.
Italy--Relations--Russia.
Kievan Rus--Relations--Byzantine Empire.
Russia--History--To 1533.
Russia--Relations--Byzantine Empire.
Russia--Relations--Italy.
Princeton subject headings: