Joseph Anton Koch ( 1768 - 1839 ) was a Swiss painter. Joseph Anton Koch s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 82.43 USD for Pflügender Bauer. in 2004 to a remarkable record 918419.05 USD for HEROISCHE LANDSCHAFT MIT REGENBOGEN (HEROIC LANDSCAPE WITH RAINBOW) in 2008 , based on the size and medium of the artwork.