The Now and Contemporary Evening Auction on 20 November features a selection of iconic works that have both reflected and defined American cultural life over recent decades. Highlights range from Willem de Kooning’s striking Untitled XXV (est. $9-12 million) to Lichtenstein’s Pop Art portrayal of the Oval Office (est. $1-1.5m), to a group of iconic Keith Haring subway drawings (estimates range from $40,000 - 700,000, on offer in the Contemporary Day Auction), to Maurizio Cattelan’s Comedian (est. $1-1.5m), a banana fastened with duct tape to a wall that shocked the crowds in its debut at Art Basel Miami Beach and instantly went viral.