Ingeborg Luise Wallheimer Kahlenberg (Bremen, March 27, 1920 – New York, October 2, 1996) was a German-born photographer and member of the Dutch resistance during the Second World War.

[1] The group filmed and photographed German activities and the famine and privations suffered by the Dutch, beginning in November 1944.

It operated covertly, in violation of Nazi restrictions against photography outside domestic spaces in the Netherlands.

Photographs taken by Ingeborg Wallheimer and Fritz Kahlenberg were instrumental in convincing the Red Cross to make food drops in Holland.

[4] In addition to photography, Wallheimer's resistance activities included illegal communications, transporting armaments, and forgery.