Columbia subject headings:
Harvard subject headings:
Byzantine Empire--Relations--Holy Roman Empire.
Cologne (Germany)--History.
Holy Roman Empire--Relations--Byzantine Empire.
Queens--Holy Roman Empire.
Theophano, Empress, consort of Otto II, Holy Roman Emperor, 958-991.
Princeton subject headings:
Art, Medieval--Byzantine influences.
Cologne (Germany)--Civilization.
Theophano, Empress, consort of Otto II, Holy Roman Emperor, 958-991.