NEW YORK (WUSA9/Getty Images) -- A proclamation written by George Washington was displayed at Christie's Gallerieson Thursdayprior to being auctioned in New York City.

According to Christie's, this was the first proclamation made by a United States President, declaring the first Thanksgiving holiday.

Signed by George Washington on November 3, 1789, the piece is expected to fetch between $8-12 million.

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