Olaf Wieghorst ( 1899 - 1988 ) was a Danish painter. Olaf Wieghorst s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5100 USD for COWBOY ON HORSEBACK in 2003 to 289000 USD for OPENING OF THE CHEROKEE STRIP in 2008 , based on the size and medium of the artwork.