Karl Schlesinger ( 1825 - 1893 ) was a German painter. Karl Schlesinger s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1380 USD for Le Portrait Parlant (A Speaking Likeness) in 2006 to 8225 USD for Martin Luther and the Indulgences in 2007 , based on the size and medium of the artwork.