Johann Christoph Erhard ( 1795 - 1822 ) was a German painter. Johann Christoph Erhard s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 118.01 USD for In den Ruinen von Burg Starhemberg in 2004 to 3387.3 USD for Österreichische Marketänder in 2007 , based on the size and medium of the artwork.