Founded in 1926 by Harriet Upson Allyn in memory of her father, Captain Lyman Allyn, the Museum is housed in a handsome neo-classical building designed by Charles Platt and features 10 exhibition galleries, a research library, auditorium, and a visual and performing arts studio. Museum grounds include 12 acres of park, a sculpture trail, the McCourt 9/11 Memorial Garden, and picnic areas. The Museum and much of the grounds are wheelchair accessible.