Nicolaes Knupfer (after) ( 1603 - 1660 ) was a German painter. Nicolaes Knupfer (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2455.62 USD for Mars and Venus and putti playing with armour in 2004 to 10126.58 USD for ACHILLES DISCOVERED AMONG THE DAUGHTERS OF LYCOMEDES in 2008 , based on the size and medium of the artwor