The author reconstructs the psychological interpretation of Giordano Bruno's personality through the work of Wilhelm Dilthey, who defined him a central figure in the history of modern thought, and who thus contextualized the interpretation of the implicit 'historical problem' in Bruno in the broader frame of the foundation of the humanities according to a 'descriptive and analitical' psychology. The latter scrutinizes through biographical research the link between individual life and historical moment. Now, Bruno's case is an illustrative example of " (...) class='Hi'>Lebensverfassung", that is, of a particular "psychical constitution" that explains the links between physical and spiritual worlds, and attributes a superior sense to the very facts of cultural history. (shrink)