Grapes, a spiky cluster of wooden stools from the Qing Dynasty (1644-1911), is part of Ai Weiwei's repurposed furniture series. Cathy Carver/Courtesy Hirshhorn Museum hide caption

itoggle caption Cathy Carver/Courtesy Hirshhorn Museum

Edward Hopper is well-known in the U.S. for paintings such as Nighthawks (1942)pensive, lonely portraits of people sitting together yet alone. He was less well-known in France, but an exhibit of his work at the Grand Palais has drawn impressive crowds. The Art Institute of Chicago, Friends of American Art Collection/Courtesy of the Art Institute of Chicago hide caption

itoggle caption The Art Institute of Chicago, Friends of American Art Collection/Courtesy of the Art Institute of Chicago

Among his many accomplishments, Ralph Steadman illustrated Hunter S. Thompson's 1971 novel, Fear and Loathing in Las Vegas, about a journalist's reporting trip turned hallucinogenic bender. Courtesy of Itch Film hide caption

itoggle caption Courtesy of Itch Film

One of Kermit Oliver's designs for Hèrmes Jason Sheeler hide caption

itoggle caption Jason Sheeler

There's an empty space today where a Henri Matisse painting had been hanging at the Kunsthal museum in Rotterdam, Netherlands. Seven paintings were stolen Tuesday, including works by Pablo Picasso, Claude Monet and Paul Gauguin. Peter Dejong/AP hide caption

itoggle caption Peter Dejong/AP

Roy Lichtenstein leaves it up to the viewers to decide what has just transpired in his 1964 painting of a tense phone call titled Ohhh ... Alright ... Estate of Roy Lichtenstein hide caption

itoggle caption Estate of Roy Lichtenstein