Louis René Letronne ( 1790 - 1842 ) was a French painter. Louis René Letronne s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 285.25 USD for Comtesse Rosalie Rzewuska N√©e Princesse Libormirska in 2004 to 8767.46 USD for PORTRAITÔæ† OFÔæ† GENERALÔæ† ALEXANDERÔæ† CHERNYSHEV in 2012 , based on the size and medium of the artwork.