David Katz (1 October 1884, Kassel – 2 February 1953, Stockholm) was a German-born Swedish psychologist and educator who specialized in Gestalt psychology and phenomenology. He was a professor Emeritus at the University of Stockholm. Prior to the establishment of the Nazi regime in Germany, he served as the chair of psychology and education at the State University of Mecklenburg in Rostock. Source: Wikipedia (en)