This publication presents, for the first time, the artistic life-work of Roswitha Ennemoser (1953 - 2008) to the public. Her oeuvre is in the tradition of constructive-concrete art and from early on it was distinguished by a reduced language of forms. Not only the serial and mainly multi-part objects (wall hung and free-standing) but also her writings come from in-depth analysis of perception. The continuous questioning of form, space and colour creates a multi-layered interplay in the physical form of the objects. Roswitha Ennemoser’s art is thus a symbiosis between intellectual thought and aesthetic form creation.