Gottfried Jäger (*1937) is one of the most important photographers and photo theorists of the post-war period. Alongside Otto Steinert (Essen) and Bernd & Hilla Becher (Düsseldorf), Jäger influenced generations of photographers with his non-objective photography and his teaching at the Bielefeld University of Applied Sciences. As early as the 1960s, he developed the term "generative photography". For him, the photographic means themselves become the subject, the medium the object. He is a "photographer of photography" (B. Stiegler). The Bielefeld artist also played an important role with his theoretical writings on imaging photography (including in dialogue with V. Flusser and L. Wiesing). A retrospective of his work is a desideratum of the exhibition industry. The approximately 400 square meter presentation of the Sprengel Museum Hannover will achieve this with an exemplary selection of works from the artist's most important creative forms and periods in six rooms.