The Chicago Institute was to a large extent modeled by Alexander on the Berlin Institute. This article, however, is perhaps more noteworthy for its contribution to the history of psychoanalysis than for its discussion of the history of the development of the Chicago Institute. For example, Hans Sachs was the first training analyst. He became a training analyst for what was known at the time as the Berlin Psychoanalytic Society, founded by Karl Abraham in 1908, but it was not until 1923 or 1924 that it became an official training center. The word "institute" was first used at a meeting of the Berlin Psychoanalytic Society in 1922, and the Vienna Society opened its Institute three years later in 1925. Many other well-known psychoanalysts are discussed in this article. The Chicago Institute built its experience upon its heritage from Vienna and Berlin and over the years widely extended its influence by sponsoring institutes in other areas: Topeka, Detroit, Cincinnati, Denver, and St. Louis.