The Art Institute of Chicago is a private, nonprofit art museum in Grant Park, Chicago, Illinois, United States. Founded in 1879, it is one of the oldest and largest art museums in the United States. The museum is based in the Art Institute of Chicago Building in Chicago's Grant Park. Its collection, stewarded by 11 curatorial departments, includes works such as Georges Seurat's A Sunday on La Grande Jatte, Pablo Picasso's The Old Guitarist, Edward Hopper's Nighthawks, and Grant Wood's American