PASADENA, CALIF. -- TUESDAY, MARCH 24, 2015: James Abbott McNeill Whistler’s painting, “Arrangement in Grey and Black No.1,” also famous under its colloquial name Whistler’s Mother, part of a 19th century masterpiece swap between the Musée d’Orsay in Paris and the Norton Simon Museum sits on display after its installation in Pasadena, Calif., on March 24, 2015. (Marcus Yam / Los Angeles Times) (Marcus Yam / Los Angeles Times)