Some time ago Leicester Museum had a really moving exhibition of the work of this artist.
It came into my mind with the Holocaust anniversary and I thought it might interest some of you.
The exhibition was really well put together to show the atmosphere in Germany at the time, how Koelz had to escape quickly, the painting was cut up and given out to various friends for safekeeping. His daughter only learnt about it as an adult and set about tracking down the pieces - many are still missing.
link to museum website