Janusz Tazbir, an outstanding researcher on the history of the Polish culture (i.e. 16th and 17th century religious issues in particular) has adhered to the Historical Institute of the Polish Academy of Sciences almost all his career. He has become extremely popular among readers, which is not a very typical feature among researchers. The following is his professional curriculum: magister 1950, doctor 1954, docent 1960, associate professor 1966, full professor 1973, corresponding (1983) and full 1989) member of the Polish Academy of Sciences; chairman of the Union of Social Sciences (1992-1998), vice-chairman of the Polish Academy of Sciences in Warsaw (1999-2003), corresponding member of the Polish Academy of Sciences and Arts in Krakow (2004), PEN Club and the Warsaw Scientific Society; chairman of the Central Commission for Academic Titles and Degrees (1997-2006); editor of the 'Odrodzenie i Reformacja w Polsce' (for more than half a century). Currently, he is holding a position among leading researchers of the older generation, who pursued their branch of research in agreement with reality. They adhered to the Latin saying that history is the teacher of life.