I.M. Pei-designed museum holds modern and contemporary American and European paintings, sculpture and prints by Matisse, Stella, Warhol, Kelly, Pollock, Picasso, Motherwell, et al. Newly renovated with 12,250 square feet of additional public space, featuring skylight tower galleries highlighting works by Alexander Calder and Mark Rothko. New roof terrace with sculptures and views of the Capitol. Villareal LED passage to West Building. Mon.-Sat. 10 a.m.-5 p.m., Sun. 11 a.m.-6 p.m. Free. Gift shop and cafes.