Yet another round of records was set at Christie’s New York last night, as Andy Warhol’s famous portrait of Mao Zedong sold for $17.36 million, the most ever paid for a Warhol. “Two other portraits of classic Warhol subjects – Marilyn Monroe and Jackie Kennedy – sold for over $30m in total. Willem de Kooning’s Untitled XXV fetched $27.1m. The $240m sale set new records for 19 artists and caps a fortnight in which Christie’s and rivals Sotheby’s took $1bn between them.”