Christie's on Instagram: "The final evening of our 20th and 21st Century Art auctions unfolded, with Christopher Wool’s four-letter provocation ‘Untitled (RIOT)’ leading at $19.84 million. Other highlights of the night included Andy Warhol’s ‘The Last Supper’ (1986) from the Edlis | Neeson Collection, the final commission of his career, which sold for $8.12 million. Kerry James Marshall’s powerful ‘Portrait of John Punch (Angry Black Man 1646)’ (2007) realised $7.15 million, while Ed Ruscha’s ‘H