Postcard of the New National Museum, December 7, 1913, Smithsonian Archives - History Div, Postcard of the new U.S. National Museum, now the National Museum of Natural History. The roof appears reddish-pink on the postcard, though in reality it is actually gold. The grounds are empty and the trees are partially bare. There is not a message on the postcard, but it is addressed to Miss Mary G. Wilson. The card is postmarked December 7, 1913..