Bertha Schilling ( 1870 - ) is a German painter. Bertha Schilling s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1561.47 USD for Sommertag an der Wümme in 2004 to 2451.93 USD for Summer in Fischerhude in 2008 , based on the size and medium of the artwork.