Our guided tours of the building site offer glimpses behind the scenes that are only possible while the former Congress Hall is being renovated. In July the most extensive renovation in the building’s history began, together with the modernisation of the structural fabric, which has remained unaltered for nearly fifty years now. Experts will describe and comment on the Congress Hall’s unique architecture and the historical context at the time of its construction. The design by US architect Hugh Stubbins, who died only recently, with its symbolic forms and great openness and transparency, makes the building an important 1950s architectural monument. Stubbins set ambitious technical goals and triggered a heated debate among his fellow architects. Join our guided tour and make your own discoveries: peer through open ceilings, examine exposed pipe systems, look through open doors at equipment otherwise concealed and experience the site for yourself.