Miklós Nyiszli

Miklós Nyiszli (17 June 1901 – 5 May 1956) was a Hungarian prisoner of Jewish heritage at Auschwitz concentration camp. Nyiszli, his wife, and young daughter, were transported to Auschwitz in June 1944. Upon his arrival, Nyiszli volunteered as a forensic doctor and was sent to work at No. 12 barracks where he mainly performed autopsies. He was under the supervision of Josef Mengele, a Schutzstaffel officer and physician.

Mengele decided after observing Nyiszli's skills to move him to a specially built autopsy and operating theatre. The room had been built inside Crematorium II, and Nyiszli, along with members of the 12th Sonderkommando, was housed there.