Vanderbilt Mansion National Historic Site in Hyde Park, New York, preserves two hundred eleven acres of a Hudson River estate whose history reaches back to 1764. The property passed through several prominent owners before Frederick William Vanderbilt and Louise Holmes Anthony acquired the six hundred-acre estate in 1895. Their mansion, designed by McKim, Mead and White and built from 1896 to 1899, embodied Beaux-Arts architecture, richly furnished American Renaissance interiors, and advanced technology including electric lighting from the estate’s own hydroelectric plant. With its formal gardens, carriage house, and preserved furnishings, the estate remains an unusually complete example of a Gilded Age Hudson River country seat.