On the eve of the Bolshevik coup d'état, the Orthodox Church claimed a hundred million adherents, two hundred thousand priests and monks, seventy-fiv… - Michael Burleigh

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On the eve of the Bolshevik coup d'état, the Orthodox Church claimed a hundred million adherents, two hundred thousand priests and monks, seventy-five thousand churches and chapels, over eleven hundred monasteries, thirty-seven thousand primary schools, fifty-seven seminaries and four university-level academies, not to speak of thousands of hospitals, old people’s homes and orphanages. Within a few years, the intuitional structures were swept away, the churches were desolated, vandalized or put to secular use. Many of the clergy were imprisoned or shot; appropriately enough the first concentration camp of the gulag was opened in a monastery in Artic regions.