Title: V katakombakh
Subjects: History, Church history, Communism and Christianity, Istinno pravoslavnai︠a︡ t︠s︡erkovʹ, Orthodox Eastern Church, Istinno-pravoslavnai͡a t͡serkovʹ, Istinno-pravoslavnai︠a︡ t︠s︡erkovʹ
Places: Soviet Union
Time periods: 20th century