Developed between 1963 and 1969, the Werksatz is a seminal piece in the corpus of Franz Erhard Walther (1939, Fulda). These fifty-eight objects wrapped in cotton covers and precisely stacked can be unfolded to become sculptures, which requires the action of viewer-performers. A series of photographs documents this activation, encouraging the viewer to imagine the forms and structures contained in these light-colored cloth packages in many shapes and sizes. Thus an entire catalogue of the artist’s explorations in the 1960s can be discovered here. His investigations, which continued to fuel his work in later decades, already contained the specific elements of his sculpture: the need of the body to perform the work, the theoretical openness and indeterminateness of forms, the importance of language and process for activating these forms, and, lastly, the diversity of means of presentation, and therefore of existence, of works.