Jean martial Fredou ( 1711 - 1795 ) was a French painter. Jean martial Fredou s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1152.83 USD for Portrait d'ecclésiastique in 2006 to 13121.3 USD for Portrait de Marie-Antoinette Dauphine in 2006 , based on the size and medium of the artwork.