Columbia subject headings:
Civilization, Medieval--Congresses.
East and West--Congresses.
Europe--Civilization--Arab influences--Congresses.
Europe--Civilization--Byzantine influences--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
East and West--Congresses
Europe--Civilization--Arab influences--Congresses.
Europe--Civilization--Byzantine influences--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
East and West--Congresses.
Europe--Civilization--Arab influences--Congresses.
Europe--Civilization--Byzantine influences--Congresses.
Theophano, Empress, consort of Otto II, Holy Roman Emperor, 958-991.