RAW COLOR: THE CIRCLES OF DAVID SMITH An installation of paintings and sculptures from a famous series made by the great American sculptor. Also, other exhibitions, a reinstalled permanent collection and a new building designed by Tadao Ando on a revamped campus. Smith exhibition runs through Oct. 19. Sterling and Francine Clark Art Institute, Williamstown. 413-458-2303, www.clarkart.edu
TURNER & THE SEA J.M.W. Turner’s vision of the sea as a stage fit for stirring drama is extensively demonstrated in this show organized by the National Maritime Museum in London. The great painter gives us the full treatment in a memorable show. Through Sept. 1. Peabody Essex Museum, Salem. 866-745-1876, www.pem.org
UNKNOWN HOPPER: EDWARD HOPPER AS ILLUSTRATOR A comprehensive survey of the great American realist’s little-known 20-year career (1906-25) as a producer of cover and story illustrations for periodicals such as Country Gentleman, Scribner’s magazine, The Morse Dial, and Hotel Management. Through Oct. 26. Norman Rockwell Museum, Stockbridge. 413-298-4100, www.nrm.org
ANSELM KIEFER A major long-term installation of works by the German artist from the Hall Art Foundation in a new gallery repurposed by the foundation. Massachusetts Museum of Contemporary Art, North Adams. 413-662-2111, www.massmoca.org
SEBASTIAN SMEESebastian Smee can be reached at firstname.lastname@example.org.