The book examines the condition of religion and the Church in the Soviet Union, the relationship between the Soviet authorities and the Church, and tells of church holidays and rites, of church music and art, and of the distinctions between the Orthodox and the Catholic Churches. Light is shed on the peace activities of the Russian Orthodox Church. The author visited the religious centres of Moscow and Leningrad, Pskov, Petrozavodsk, Vladimir, Suzdal, and other towns. The author asked churchmen numerous questions, such as, "Are believers persecuted in the USSR?", "Are priests heckled or ridiculed in the streets?" "Are young people to be found among the believers?", and the like. The book is published on the 1000th anniversary of the introduction of Christianity in Russia.