Johann Baptist Hirschmann ( 1770 - 1829 ) was a German painter. Johann Baptist Hirschmann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 611.65 USD for A portrait of a blond gentleman in a blue coat in 2006 to 1221.33 USD for Jagdstillleben in Trompe-l’œuil-Technik. in 2007 , based on the size and medium of the artwork.