The PMA is the major art institution of northern New England, holding strong collections of American art (Homer, Hopper, Wyeth), French Impressionists, and a serious contemporary programme. The building itself is good: I. M. Pei's firm designed the brick main wing in 1983, and the museum spreads through two earlier mansions and out to the Winslow Homer studio at Prouts Neck.
Allow at least two hours. Free admission on Friday evenings. Seven Congress Square, in the heart of the Arts District.