Auction houses are rebranding as cultural destinations amid a topsy-turvy market

By Jacqui Palumbo, CNN New York (CNN) — At the base of the world’s most slender skyscraper, stretching high above Billionaires’ Row in Manhattan, Bonhams will relocate its American headquarters next month. The auction house leaves behind its more cloistered Madison Avenue home for airy galleries in an 80-foot glass atrium, as well as an