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

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