Lotte Rotholz from the Baum Gruppe The Baum Gruppe was characterized by a disproportionate number of very young members, especially young women. At the age of twenty, group member Lotte Rotholz (née Jastrow), pictured here, was sent to Auschwitz, where she was murdered.Institution: Yad Vashem, Jerusalem. Print Full Image Institution Yad Vashem Related contentEncyclopedia Article: Baum Gruppe: Jewish Women