The name’s clunky, but the transformation of the Smithsonian American Art Museum and National Portrait Gallery into the Donald W. Reynolds Center for American Art and Portraiture (Eighth and F sts., NW; 202-633-1000; americana rt.si.edu/reynolds_center) is glorious. The renovation, six years in the works, both modernized and restored the Greek Revival grandeur of the Old Patent Office building—after the White House and the Capitol, the third-oldest in Washington. And there’s more to come: The courtyard, redesigned by Lord Norman Foster, will be covered by a glass canopy next year. Best of all, the makeover showcases the two museums’ wide-ranging collections to stunning effect. It’s the don’t-miss museum experience of the year.