The Portland Museum of Art, or PMA, is the largest and oldest public art institution in the U.S. state of Maine. Founded as the Portland Society of Art in 1882. It is located in the downtown area known as The Arts District in Portland, Maine. History The PMA used a variety of exhibition spaces until 1908; that year Margaret Jane Mussey Sweat bequeathed her three-story mansion, now known as the McLellan House, and sufficient funds to create a gallery in memory of her late husband, Lorenzo De Medici Sweat, who was a U.S. Representative. Noted New England architect John Calvin Stevens designed the L. D. M. Sweat Memorial Galleries, which opened to the public in 1911. Over the next 65 years, as the size and scope of the exhibitions expanded, the limitations of the Museum's galleries, storage, and support areas became apparent. From 1960 to 1962, Donelson Hoopes served as its director. In 1976, Maine native Charles Shipman Payson promised the Museum his collection of 17 paintings by Winslow Homer. Recognizing the Museum's physical limitations, he also gave $8 million toward the building of an addition to be designed by Henry Nichols Cobb of I. M. Pei & Partners. Construction began on the Charles Shipman Payson Building in 1981, and within two years the $8.2 million facility was opened to the public. Payson's gift of the Homer paintings served as a catalyst for the Museum's expansion as well as for significant long-term loans and outright gifts to the Museum. In direct response to the Payson gift, the 1979 gift of the Hamilton Easter Field Art Foundation Collection added more than 50 paintings, sculptures, and works on paper by American modernists to the collection. In 1991, the Joan Whitney Payson Collection (owned by Charles Payson's wife Joan Whitney, a Whitney family heiress and New York City socialite) of 20 impressionist and post-impressionist works of art was given to the Museum on permanent loan. In 1996, Elizabeth B. Noyce, art collector and Maine philanthropist, bequeathed 66 works of American art, which is the most extensive and diverse gift of American art ever presented to the Museum. The PMA attracts approximately 140,000 visitors a year, and has around 8,500 members. Collection The Museum's collection includes more than 22,000 artworks, dating from the 18th century to the present. The PMA's collection features works by artists including Winslow Homer, Marsden Hartley, John Marin, Louise Nevelson,