Wolfgang Köhler was an internationally recognized leader in experimental psychology. Along with Max Wertheimer and Kurth Koffka, he was a founder of Gestalt psychology, which strongly affected the development of psychology for more then half a century. The Wolfgang Köhler Papers consist of 8 linear feet and are arranged into eight series: correspondence, grant material, lectures, manuscripts, notes, reports of assistants, research notebooks, and photographs and slides. The material relates to Köhler's career as one of the founders of Gestalt Psychology, and work as a experimental researcher.