It is an architectural landmark and a technical masterpiece at the same time. The intention was to create a symbol of democracy and freedom on this historically important building. The steel-glass construction allows uninterrupted views into the chamber of the German Bundestag. The passage of daylight underlines the transparency of the government and openness towards its citizens. The daylight is directed down into the chamber by rows of mirrors. Movable computer-controlled sunshields protect from direct sunlight. The viewing platform is accessible via two identical, intertwining spiral ramps of shaped steel sheet.