Hans Hammarskiöld ( 1925 - ) is a Swedish painter. Hans Hammarskiöld s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 483.71 USD for Claes Oldburg, London 1966 in 2004 to 25956.69 USD for Spanska ridskolan in 2011 , based on the size and medium of the artwork.