United States Holocaust Memorial Museum Collection, Gift of Marvin Benn Marvin Benn acquired the collection of documents during a visit to Warsaw, Poland, in 1980. Jan Rochwerger, a Jewish resident of Warsaw, gave him the doucuments from a water-damaged box full of other papers belonging to the exterminated Jewish community of Poland. The collection was donated to the United States Holocaust Memorial Museum in 2005 by Marvin Benn.