François Cornelis Knoll ( 1772 - 1827 ) was a painter. François Cornelis Knoll s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 907.84 USD for A dead cod on a barrel with a fishing net in 2014 to 7797.88 USD for Studies of cauliflowers in 2015 , based on the size and medium of the artwork.