 Hans Reichenbach, Carnap and Schlick’s ally in Berlin, was the leader of the Berlin Society for Scientific Philosophy, also known as the Berlin Circle, and hence was in personal and intellectual interaction with Wolfgang Köhler in Berlin. Eventually he would mention Gestalt theory in his writings in 1931, in ‘Aims of Modern Philosophy of Nature’. There he raised the question of the philosophical problems of psychology and focused on Gestalt theory as ‘a recent development’ that ‘subsumes psychological events under the concept of Gestalt (…) an organized arrangement of experiences’ (Reichenbach 1931/1959, 88).