New London exhibition includes harrowing Nazi directives and testimony from persecuted Roma and Sinti minorities.
Margarethe Kraus was just a teenager in 1943 when she was deported from her home in Czechoslovakia to Auschwitz.
While imprisoned in the concentration camp, she endured extreme maltreatment and was subject to medical experiments.
She survived the Holocaust. Her parents did not.
They were among the 250,000 to 500,000 Roma and Sinti people - between 25 and 50 percent of the minority's entire population in Europe at the time - murdered by Nazis and their collaborators during the second world war.
Kraus's story features in a new exhibition at London's Wiener Holocaust Library.
