Mario Merz ( 1925 - 2003 ) was an Italian painter. Mario Merz s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 9305.1 USD for WAS MACHEN? in 2003 to a remarkable record 1572500 USD for Untitled (Fibonacci) in 2017 , based on the size and medium of the artwork.