Title: Svi︠a︡to-Vvedenskai︠a︡ ostrovnai︠a︡ pustynʹ
Subjects: History, Monasteries, Kozelʹskai︠a︡ Vvedenskai︠a︡ Optina (Monastery), Church history
Places: Russia (Federation), Kozelʹsk (Russia), Kozelʹsk