Arts patron, gardener and philanthropist Rachel "Bunny" Mellon died at her home in Upperville, Va., on Monday. She was 103.

The wife of Pittsburgh arts patron and banking heir Paul Mellon, who died at 91 in 1999, "Bunny" was a Listerine fortune heiress who became known for redesinging the White House Rose Garden at the request of President Kennedy. She was a longtime friend of Jacqueline Kennedy Onassis.

The Mellons donated more than 1,000 objects to the National Gallery of Art, including works by the likes of Cezanne, Degas and van Gogh. They also helped fund the gallery's I.M Pei-designed East Building in the 1970s. His father, Andrew Mellon, had founded the National Gallery and funded the neoclassical West Building. Paul Mellon's interest began with British art, but his wife steered him toward Impressionism and post-Impressionism.

With residences in Washington, New York, Cape Cod and Antigua in the West Indies, Mrs. Mellon stayed primarily at the couple's 4,000-acre Fauquier County, Va., estate. She avidly pursued gardening, landscape design and the history of gardens, amassing a vast collection of antiquarian garden books, manuscripts and botanical prints.

Mrs. Mellon is survived by a son from her first marriage, Stacy B. Lloyd III of Washington; two stepchildren, Timothy Mellon of Saratoga, Wyo., and Catherine Mellon Conover of Washington; five grandchildren; and two great-grandchildren. Her daughter from her first marriage, Eliza Lloyd Moore, died in 2008.