Pierre Bonnard ( 1811 - 1891 ) was a painter. Pierre Bonnard s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 600 USD for Conversation'' (Bouvet 28) in 2017 to 1500 USD for ''La Lettre'' (Bouvet 98 in 2017 , based on the size and medium of the artwork.