Description: Revamping our online postcard exhibit poses the challenge of dating unused postcards. Here’s how I have hunted down clues to solve the mystery!
Description: The Smithsonian Institution Building, or the “Castle,” is the most iconic of all the Smithsonian’s 769 facilities, which include its nineteen museums, nine research centers, National Zoo, and all of its other establishments. The Castle was the first building constructed specifically for the Smithsonian after it was founded in 1846. On March 19, 1847, a contract was signed with