It Took Them 4 Hours To Open, But What They Found Inside Made It All Worth It

During the construction of the Massachusetts State House, Paul Revere, Samuel Adams, and William Scollay placed a small box in the cornerstone.

Using dental tools and a porcupine quill, Pam Hatchfield, head of objects conservation for the museum, carefully removed the box from its home when it was uncovered during standard repairs.

Source: Sfglobe.com