[1] Walter Bornheim attended grammar school in Cologne and worked for the Lempertz auction house in Cologne, and later for Bihn, a graphics dealer in Paris.
In 1936/37, he acquired the art dealership A. S. Drey in Munich in the course of "Aryanization", which he renamed "Galerie für Alte Kunst G.m.b.H.".
[6] The OSS Art Looting Investigation Unit considered Bornheim a major player in the Nazi looted art business, and dedicated a Detailed Interrogation Report to him in 1945[7] in addition to mentioning him numerous times throughout their list of art looting Red Flag Names.
[8] After the war, Bornheim continued to work as an art dealer in Gräfelfing near Munich.
Art that was looted from Jewish collectors or sold under duress to Bornheim is the object of numerous ongoing research projects.