 As we said, in 1900, Stumpf established the Institute of psychology in Berlin which was at the origin of the original movement in psychology called Gestalt psychology. With the exception of Max Wertheimer, who did his dissertation in 1904 under the direction of Külpe in Würzburg, the other psychologists of the Institute of Berlin, Wolfgang Köhler, Kurt Koffka, Kurt Lewin, Egon Brunswik and Adhemar Gelb undertook their apprenticeship in psychology and philosophy under Stumpf’s supervision. This is also the case of Robert Musil and C. von Allesch. However, although the Gestaltists in Berlin had initially adopted Stumpf’s phenomenological standpoint, they departed significantly from Stumpf’s conception of the mind. (M. Ash, 2000–2001, 1998; F. Toccafondi, 2009). Despite Stumpf’s significant contribution to the debate on the nature of Gestalt and psychology in general, he was targeted by Köhler (1913) in his classical paper on the constancy hypothesis, and which is sometimes considered to be the very beginning of Gestalt psychology. Stumpf replied to this objection in his posthumous book by saying that Köhler was wrong in eliminating founding contents in favour of the constancy hypothesis. The following excerpt from his book Erkenntnislehre summarizes the main issues in this dispute: