Hanni Franke ( 1890 - 1973 ) was a German painter. Hanni Franke s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 428.12 USD for Porträt der Schwester des Künstlers, Elisabeth Franke, vor einem geöffneten Fenster sitzend in 2005 to 581.31 USD for Mittelgebirgslandschaft in 2011 , based on the size and medium of the artwork.