Niels Gronbech ( 1907 - 1991 ) was a Danish painter. Niels Gronbech s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 265.87 USD for Frederiksberg Castle in 2005 to 818.53 USD for Parti fra Frederiksberg Have in 2006 , based on the size and medium of the artwork.