Otto Protzen ( 1868 - 1925 ) was a German painter. Otto Protzen s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 48.29 USD for Fischerhütte und Ruderboot am See in 2006 to 191.05 USD for Herbstliche Allee. in 2014 , based on the size and medium of the artwork.