Alexandre Benoist Jean Dufay Casanova ( 1770 - 1844 ) was a French painter. Alexandre Benoist Jean Dufay Casanova s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2185.94 USD for Projet de décor de théâtre pour l'opéra de Charles Gounod Faust in 2007 to 236500 USD for Portrait of the Emperor Napoleon Bonaparte in 2011 , based