Neeka’s Backlog tells some interesting stories of religion in the Soviet Union:
Turns out the Soviet penal code had an article for offending the religious feelings of believers and worshippers, and for desecration of religious objects. It was there since 1961 and foresaw a sentence of up to three years. That in a country where most churches served as vegetable warehouses and gyms.
She goes on to explain how the only mosque in Moscow was saved from destruction on the eve of the 1980 Olympics.