Francois Van Knibbergen ( 1597 - 1670 ) was a Dutch painter. Francois Van Knibbergen s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 11613.5 USD for River landscape in 2006 to 13750 USD for An extensive landscape with a walled city and travelers in 2011 , based on the size and medium of the artwork.