SI—Q®
What is one secret the Smithsonian might never uncover?

The cornerstone of the Smithsonian Castle was laid in a special ceremony on May 1, 1847. Archival documents describe the ceremony in great detail, but no one thought to record the stone's actual location. If you were at the 1847 ceremony and remember where we left the cornerstone, do let us know!

A fundamental oversight ›

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