Erwin Lang ( 1886 - 1962 ) was an Austrian painter. Erwin Lang s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 217.36 USD for Standing female nude in 2005 to 51400 USD for The dancer Grete Wiesenthal with her son and sister in 2007 , based on the size and medium of the artwork.