LOUISVILLE, Ky. (WDRB) -- A rare copy of the Declaration of Independence that once belonged to a Louisville family has been sold.

It belonged to Michael O'Mara and his family, who used to live in Louisville.

The document was part of a few heirlooms believed to have been passed down from President James Madison.

O'Mara sold his family's copy to billionaire philanthropist David Rubenstein for an undisclosed amount of money. It will first be displayed at the Smithsonian Institution, and eventually at a more permanent home.

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