Robert Motherwell ( 1915 - 1991 ) was an American Abstract Expressionism painter. Robert Motherwell s works have been put up for auction numerous times, with realized prices greatly surpassing estimated prices, varying from 1647.34 USD for Plate I, from: Sirens in 2015 to a remarkable record 10287200 USD for ELEGY TO THE SPANISH REPUBLIC NO. 134 in 2019 , based on the size and medium of the artw