What network of German Nazi concentration camps and extermination camps built and operated by the Third Reich was where Magda Spiegel was murdered?
Magda Spiegel Magda Spiegel (1887–1944) was a German contralto who was a member of the Frankfurt Opera ensemble and was murdered in the Auschwitz concentration camp. The baritone Richard Breitenfeld, also of the Frankfurt Opera, shared the same fate.
Doggerstollen The Doggerstollen was a subcamp of the Flossenbürg concentration camp in World War II, close to the village of Happurg. It was an underground factory, where the production of BMW aircraft engines was planned. The Doggerstollen was built by approximately 9500 prisoners of whom 4000 died ("Extermination through labor", German: "Vernichtung durch Arbeit" ).