Johann Ernst Heinsius ( 1740 - 1812 ) was a German painter. Johann Ernst Heinsius s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 10920.82 USD for CHEVAL TENU PAR UN VALET DANS UN PAYSAGE in 2004 to 31743.45 USD for Marie-Adélaïde de France, dite Madame Adélaïde, fille de Louis XV (1732-1800) in 2018 , based on the size and