COURBET: MAPPING REALISM Drawing on collections in Belgium and the United States, the show traces the influence of the father of 19th-century realism on artists and collectors in both countries. Through Dec. 8. McMullen Museum of Art, Boston College. 617-552-8100, www.bc.edu/bc_org/avp/cas/artmuseum
MAURICE PRENDERGAST: BY THE SEA A retrospective of the great early American modernist’s work, focusing on his depictions of leisure activities by the sea. Through Oct. 13. Bowdoin College Museum of Art, Brunswick, ME. 207 725 3275. www.bowdoin.edu/art-museum Full story for BostonGlobe.com subscribers.
Sebastian Smee can be reached at email@example.com