For decades, Harvard Law School has had a copy of the Magna Carta in its library. Recently, pair of historians discovered it's an original.

British academics who identified the faded manuscript as an original hailed it as “one of the world’s most valuable documents.”

Lorin Granger, Harvard Law SchoolHarvard's law school library bought this document in 1946 for $27.50, thinking it was a copy of the Magna Carta from 1327. :: King’s College London:: University of East AngliaBut British researchers have now determined it is an original from King Edward I’s 1300 re-issue of the pivotal document - one of just seven to survive.