Employees pose with 'Untitled XIX' 1982 by Willem De Kooning (estimate $6M - 8M) during a photocall for the Peggy and David Rockefeller art collection at Christie's auction house in London, Feb. 20, 2018. Christie's unveiled highlights from the Rockefeller collection ahead of the New York auction on May 7 which is expected to raise in excess of $500M, the proceeds from which are to be donated to established charities. (Photo/Agencies)
