2- Il Palazzo di Arti e Industrie dei musei Smithsonian di Washington, edificati durante l’esposizione del 1876.

epa04494591 The Smithsonian Castle, which will undergo a $2 billion US dollar (1.6 billion Euro) reconfiguration, connecting it to neighboring museums on Independence Avenue, is pictured from the roof of the US Capitol in Washington DC, USA, 18 November 2014. The Smithsonian Institute, which announced the plans on 13 November, says the revitalization will take as along as 20 years to complete. EPA/JIM LO SCALZO