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Antoinette Van Leer Polk, Baroness de Charette (October 27, 1847 – February 3, 1919) was an American Southern belle in the Antebellum South and (by marriage) French aristocrat in the Gilded Age. She was born into the planter elite, the great-niece of the 11th President of the United States James K. Polk and a member of the influential Van Leer family through her mother. She was an heiress to plantations in Tennessee and a "Southern heroine" who warned Confederate soldiers of advancing Union troops during the American Civil War. After the war, she moved to Europe, where she took to foxhunting in the Roman Campagna of Italy and the English countryside, and later became a baroness and socialite in Paris and Brittany.