Reichstag in Berlin, the photo shows the dome of the Reichstag with the walkable spiral inside. The architect Norman Foster designed the dome. The glass dome provides the parliamentary plenum with natural daylight and serves as ventilation. Reichstag building in Berlin. The large glass dome at the very top of the Reichstag has a 360-degree view of the surrounding Berlin cityscape. The main hall of the parliament below can also be seen from inside the dome, and natural light from above rad