Columbia subject headings:
Harvard subject headings:
Byzantine Empire--Church history.
Byzantine Empire--Civilization.
Christian saints--Europe, Eastern--Biography
Civilization, Slavic--Byzantine influences.
Orthodox Eastern Church--Biography.
Slavic countries--Church history.
Princeton subject headings:
Byzantine Empire--Church history.
Byzantine Empire--Civilization.
Christian saints--Europe, Eastern--Biography.
Civilization, Slavic--Byzantine influences.
Orthodox Eastern Church--Biography.
Slavic countries--Church history.