The Black Madonna

A short time later Kürten discovered that the vicarage in Kripp housed a statue of a Madonna, which had been formed from the mud of the camp by one of the POWs.
This statue had reached the vicar of Kripp, Dr. Keller, and upon his urgent request Johann Deusen conserved the crumbling statue by immersing it in oil, giving it the dark coloring resulting in the name "Black Madonna".

After much research, Kürten was able to find out that Professor Adolf Wamper had created the statue.  Unfortunately, the artist had died by then.