Walter De Maria ( 1935 - ) is an American painter. Walter De Maria s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 240000 USD for Large Rod Series: Circle/Rectangle 5, 7, 9, 11, 13 in 2005 to 577000 USD for CIRCLE/RECTANGLE 7 in 2007 , based on the size and medium of the artwork.