She stayed, though, and was arrested by the Gestapo in November 1939. After being sent to prisons in Prague and Dresden, she was moved to the concentration camp at Ravensbrück. She continued to try to help prisoners there. She died of kidney failure on May 17, 1944, at age 47. Her friend from the camp, Margarete Buber-Neumann, wrote her biography after the war. She was recognized by the Yad Vashem Holocaust Memorial as Righteous Among the Nations in 1994.