Jean Pierre Saint ours ( 1752 - 1809 ) was a French painter. Jean Pierre Saint ours s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1161.35 USD for Porta galliena. Bologna in 2006 to 27182.44 USD for Portrait of Jean-Jacques Rousseau. in 2012 , based on the size and medium of the artwork.