Mattias Grunewald (after) ( 1455 - 1528 ) was a German painter. Mattias Grunewald (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 590 USD for The Crucified Christ in 2007 to 1875 USD for John the Baptist- from the Isenheim Altarpiece in 2013 , based on the size and medium of the artwork.