Jan Groenestein ( 1919 - 1971 ) was a Dutch painter. Jan Groenestein s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 112.66 USD for AHogeschool; CGrazende paarden in 2004 to 690.72 USD for ZIRKUS in 2007 , based on the size and medium of the artwork.