Art Deco was the style that swept across the globe during the 1920s and 1930s and created the defining look of the interwar years. Its influence was ubiquitous: it transformed the skylines of cities as diverse as New York and Shanghai; it touched the design of everything - from cinemas and Hollywood films to the packaging of cigarettes, from evening wear and accessories to luxury liners and locomotives. It was the style of hedonism, of indulgence, of mass consumption, though it originated before the First World War in the luxurious one-off masterwork or the limited edition piece.