Psychobiography was invented by Sigmund Freud while investigating the psychological determinants of Leonardo da Vinci’s artistic creativity. Following the founder of psychoanalysis there were about 300 psychobiographic analyses published until 1960. From the 1930’s psychoanalysis also influenced the unfolding personality psychology trend called personology in the USA, led by G. W. Allport and Henry A. Murray, who also worked with life stories.