Wilhelm Friedenberg ( 1845 - 1911 ) was a German painter. Wilhelm Friedenberg s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2808 USD for a boy and fox in a winter landscape in 2006 to 3761.63 USD for Geschwister mit Gänsen in 2008 , based on the size and medium of the artwork.