Jahn's "synthesis of three", a response to Germany's political and social demands, explains his firm's lack of work in Chicago and large amount of European work. The environmental codes of Germany are unequaled in the large midwestern metropolis which doesn't contend with the minimal, and expensive, energy situation that Germany's politicians have been forced to deal with. From a social standpoint an architecture of transparency is incompatible with a city that deals with violence through the creation of almost impermeable enclosures. For instance Jahn's highly transparent entry (emobdying some devices used in the Bayer Headquarters) for the Illinois Institute of Technology's student union does not work in an area bordering on low-income housing projects inhabited with gangs. Rem Koolhaas's winning design, a mostly solid box with selective openings generated by circulation patterns across the site, even includes an enclosure for the "L" platform above the building, rationalized as a practical device to control noise though more so a symbol of safety and protection.

Bayer Headquarters.Leverkusen, Germany