Auction introduction: Sotheby’s is pleased to present our April Prints & Multiples auction, which will feature an extensive selection of prints spanning the 19th century to the present day, including works by Pablo Picasso, M.C. Escher, Andy Warhol, David Hockney and Roy Lichtenstein. The exhibition for this sale will be open in our New York galleries from April 13 – 18 and bidding will begin to close on April 19th.