Columbia subject headings:
Byzantine Empire--Civilization.
Istanbul (Turkey)--History.
Moldavia--History.
Orthodox Eastern Church--History.
Wallachia--History.
Harvard subject headings:
Byzantine Empire--Civilization.
Istanbul (Turkey)--History.
Moldavia--History.
Orthodox Eastern Church--History.
Wallachia--History.
Princeton subject headings:
Byzantine Empire--Civilization.
Europe--Civilization--Byzantine influences.
Istanbul (Turkey)--History.
Moldavia--History.
Orthodox Eastern Church--History.
Wallachia--History.