"Heinz Isler strongly believes that the work of the architect and the engineer cannot be separated in shell design because of its inherent integration of aesthetics and statics. [An] ideal architect-engineer relationship is epitomized by the collaboration of Heinz Isler and Michael Balz... Isler taught Balz various form-finding methods, and consequently the architect began to design his own creative shells by exploring hanging membranes and inflated forms. Although Isler and Balz only worked on a few projects together in Germany, the resulting shells (including the , the Stetten Theater, and the Balz House) are some of the most elegant works that Isler produced in his career."