Roberto Sebastián Echaurren Matta ( 1911 - 2002 ) was a Chilean painter and a seminal figure in 20th century abstract expressionist and surrealist art. Roberto Sebastián Echaurren Matta s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 17925 USD for Untitled in 2003 to a remarkable record 2490500 USD for ENDLESS NUDES in 2009 , ba