On the premises of a worldwide operating pharmaceutical company in Basle, Suisse a sculptural office building designed by Frank O. Gehry has been planned and completed. An outstanding charm is given by the transparent steel-glass-envelope covering the relatively shifted and rotated slabs as a free formed folded structure consisting of steel bars. To realize the free building geometry very close to the design idea for all project members the CAD-software CATIA was integrated into the planning process. schlaich bergermann und partner has covered the full scope of structural engineering from schematic design to execution phase. This paper describes the specialties during design, engineering, fabrication and erection of the unusual envelope made of steel and glass.