The article is divided into three parts. The first section summarizes the key scientific contributions of Niels Bohr and also clarifies selected misleading interpretation concerning the so-called Copenhagen interpretation of complementarity. The second part shows Bohr as the thinker who solved scientific problems in light of a cross-disciplinary search. Furthermore, the section presents the atmosphere of the so-called Copenhagen spirit that reigned in Bohr‘s Institute for Theoretical Physics. The last part deals with Bohr as a director of the Institute and the development or transformations of the Institute from its foundation in 1920 till the beginning of the Second World War., Filip Grygar., and Obsahuje seznam literatury