A rare copy of the U.S. Constitution laid forgotten inside a filing cabinet. Now, it could sell for millions at auction.

Treasures long forgotten by history have been uncovered beneath the surface in underground digs or hidden away in attics or storage spaces. In the case of a rare document nearly 237 years old, it was in a nondescript squat metal filing cabinet that had been sitting discarded and gathering dust in an eastern North Carolina home for who knows how long.

Two years ago, a property was being cleared out in Edenton, North Carolina when a rare copy of the U.S. Constitution was found. 

The rare piece of American history — the only U.S. Constitution of its kind thought to be in private hands – will go up for auction by Brunk Auctions on Sept. 28 in Asheville, North Carolina. The minimum bid for the auction of $1 million has already been made and it is expected to go for a much higher price tag.