As experts came across a priceless document at the University Library

Manuscript – once considered an unofficial copy of Magna Carta – Now considered a real version and “One of the most valuable documents in the world” “According to the UK.

The Harvard Law School paid $ 27.50 (then about $ 7) for it in 1946, and for years it remained hidden in its library, its true person was unknown.

But two medieval history teachers have come to the conclusion that it was unusually rare and lost its original Magna Carta since 1300 – and it could cost millions.

Eleanor Doyle BBC Newsbeat explains.

Video Tom Jaine, Anna Lamche, Jan Casey and Tom Richardson.