“Retrato de Olga” from Mexican artist Rufino Tamayo is on display during Christie’s Latin American Art preview, in New York, November 14, 2008. “Retrato de Olga” carries an estimate of 600,000-800,000 USD and will be put in auction during Christie’s Latin American Art sales on 19 November 2008. AFP PHOTO/Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)