Columbia subject headings:
Kozelʹskai︠a︡ Vvedenskai︠a︡ Optina (Monastery)--Biography.
Kozelʹskai︠a︡ Vvedenskai︠a︡ Optina (Monastery)--History.
Monasteries--Russia.
Orthodox Eastern Church--Russia.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.
Harvard subject headings:
Kozelʹsk (Russia)--Church history.
Kozelʹskai͡a Vvedenskai͡a Optina (Monastery)--Biography.
Kozelʹskai͡a Vvedenskai͡a Optina (Monastery)--History.
Princeton subject headings:
Kozelʹsk (Russia)--Church history.
Kozelʹskai︠a︡ Vvedenskai︠a︡ Optina (Monastery)--Biography.
Kozelʹskai︠a︡ Vvedenskai︠a︡ Optina (Monastery)--History.