Columbia subject headings:
Basil I, Emperor of the East, approximately 812-886.
Byzantine Empire--History--Basil I, 867-886.
Emperors--Byzantine Empire--Biography.
Harvard subject headings:
Basil I, Emperor of the East, approximately 812-886.
Byzantine Empire--History--Basil I, 867-886.
Byzantine Empire--Kings and rulers--Biography.
Emperors--Byzantine Empire--Biography
Princeton subject headings:
Basil II, Emperor of the East, approximately 958-1025.
Byzantine Empire--History--Constantine VII Porphyrogenitus, 913-959--Sources.
Byzantine Empire--History--Sources.