Book excerpt: Studying Religions with the Iron Curtain Closed and Open. The Academic Study of Religion in Eastern Europe offers an account of the research focused on the origins, development and the current situation of the Study of Religions in the 20th century in countries such as the Czech Republic, Poland, Slovakia, Hungary, Estonia, Latvia, Ukraine, and Russia. Special attention is devoted to the ideological influences determining the interpretation of religion, especially connected with the rise of Marxist-Leninist criticism of religion.