The rare document, signed by Philadelphian Charles Thomson, is one of only eight known surviving signed ratification copies of the U.S. Constitution sent to the 13 original states.

One of only a handful of ratified copies of the United States Constitution is expected to be auctioned off later this month with a starting bid of $1 million. North Carolina homeowners found the document while rummaging through an old filing cabinet as they prepared to sell their house,

An original printed copy of the U.S. Constitution that was signed in 1787 and was discovered inside an old filing cabinet in North Carolina is expected to fetch millions of dollars at auction this month.

The copy of the U.S. Constitution, one of only a handful known to exist, was found two years ago at a former plantation in Edenton, North Carolina.