Ludwig Wilhelm Plock ( 1871 - 1940 ) was a German painter. Ludwig Wilhelm Plock s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 99.95 USD for Porträt einer Frau mit Haube in 2004 to 949.91 USD for L'entrée du cirque in 2013 , based on the size and medium of the artwork.