A painting by the Art Deco painter Tamara de Lempicka, Portrait de Marjorie Ferry (1932), set a new auction record for the Polish-American artist’s work, selling for £16.2 million ($21.1 million) at Christie’s evening sale of Impressionist and modern art in London this week. This beat her previous record, set only three months ago, when La Tunique Rose (1927) sold for $13.3 million at Sotheby’s in New York. Portrait de Marjorie Ferry (seen top of...