In 1798, George Carter inherited about 3,400 acres of land from his father that became Oatlands. In 1835, he married Elizabeth O. Lewis from Upperville. Today, this couple is interred in the garden within the Carter tomb. In 1903, William Corcoran Eustis, grandson of William Wilson Corcoran, founder of the Corcoran Art Gallery, Riggs Bank, and a prominent and philanthropic Washingtonian, and Edith Livingston Morton Eustis, eldest daughter of Vice President Levi P. Morton, purchased Oatlands. Seeking a country estate, away from their primary home in Washington, they wanted a place to keep their horses and hunting hounds. William was a co-founder of the Loudoun Hunt, and Edith fell in love with and restored the gardens. The property includes breathtaking gardens largely representative of the Eustis era and includes an English tea-house, Venetian well, rose garden, faun statue, and the style represent the 20th century update. The now 400-acre property was donated to the National Trust for Historic Preservation in 1965 by Margaret Eustis Finley and Ann Eustis Emmet, daughters of William and Edith Eustis. Originally a first floor bedroom, the Eustis family added shelves to create their library. Notable artwork includes the painting over the fireplace of William Wilson Corcoran and the pottery by Maria Martinez, a well-known craftswoman of the black-on-black Pueblo style in New Mexico.