Aim: The aim of this article is to present restrictions on, and the gradual closing down of, publishing houses and Catholic press in Poland after the Second World War. Methods: The methods applied in the publication were appropriate for the history of education and the history of the press. Results: The accomplishing of this task resulted from the communist ideological assumptions of the non-sovereign Polish state, which found itself under the strong influence of the Soviet Union. According to those assumptions, Polish society, especially its young generation, was to be secularized. Within a few post-war years, the vast majority of Catholic publishing houses was closed down and the number of books and magazine titles was dramatically reduced. The circulation of the still existing press and published books was small and clearly contrasted with the fast growing propaganda and Marxist publications which were supported by the authorities. Conclusions: The article is based on previously unknown archival sources. The subject needs further in-depth research. The basic conclusion that can be drawn from the article is that the topic, which has been tackled, is very important, vast and requires further and thorough research.