the corcoran Gallery, Washington; to Aug. 21. Work by 32 less-known artists older than 60, like Sherman Drexler, prove ars is longa.

Baltimore Museum of Art; to Oct. 9. Four hot artists like the group General Idea tackle today’s big theme; the body as battleground.

National Gallery of Canada, Ottowa; to Sept. 18. Decorative arts from 1730 to 1930, by Nile-inspired designers of objets like this sugar bowl.

the Milwaukee Art Museum; to Aug. 28. A 100-work retrospective of odd paintings by the master of the Chicago style called “imagism.”

the Metropolitan Museum, New York; to Sept. 18. Little-seen work from the surrealist’s youth shows how his clocks got limp.

the Art Institute of Chicago; to Sept. 18. Woozily mystical pastels from the father of symbolism.