Columbia subject headings:
Christian pilgrims and pilgrimages--Soviet Union.
Holy fools--Soviet Union.
Orthodox Eastern Church--Soviet Union--Doctrines.
Soviet Union--Religious life and customs.
Harvard subject headings:
Holy fools--Soviet Union--History.
Mysticism--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.
Mystics--Soviet Union--History.
Princeton subject headings: