Title: Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
Subjects: History, Religious Dissenters, Persecution, Church history, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ, Orthodox Eastern Church
Places: Soviet Union
Time periods: 20th century, 1917-