Constant Artz ( 1870 - 1951 ) was a painter. Constant Artz s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1413.43 USD for Eendenfamilie langs de waterkant in 2012 to 4596.64 USD for Ducklings on a sunlit riverbank in 2013 , based on the size and medium of the artwork.