United States Holocaust Memorial Museum Collection, Gift of Emmanuel (Manny) Mandel United States Holocaust Memorial Museum Collection, Gift of Emmanuel (Manny) Mandel Emanuel (Manny) Mandel donated the Mandel family papers to the United States Holocaust Memorial Museum in 2016 and 2019. The collections numbered 2016.581.1, 2016.582.1, and 2019.483.1 have been incorporated into this collection.