Back on July 4, 1795, Samuel Adams, the Governor of Massachusetts at the time, and Paul Revere put a time capsule inside the cornerstone of the Massachusetts State House. Though time capsules in cornerstones was a common practice, researchers had no reason to believe the cornerstone of the Massachusetts State House had one, so when workers discovered the box, it caused quite a stir.

Here's the box getting opened in 2015. Let's see what's inside!

Credit: CBS This Morning