Käte Lassen ( 1880 - 1956 ) was a German painter. Käte Lassen s works have been put up for auction numerous times, with realized prices varying from 88.98 USD for Flensburg auf den alten winkeln der stadt in 2004 to 2409.79 USD for Flensburg. Aus den alten Winkeln der Stadt in 2005 , based on the size and medium of the artwork.