Hundreds of thousands of victims, including prominent scientists, artists, political and public figures of their time, number the gloomy product of the Catholic Church - the Inquisition. Modern theologians "justify" the atrocities of the Inquisition by the arbitrariness of individual church leaders or the willfulness of secular authorities. But is it? The book of Corresponding Member of the USSR Academy of Sciences I.R. Grigulevich covers the true history of the Inquisition. The book is of interest to the widest readership.