Although not ordered to take part, psychiatrists and many psychiatric institutions were involved in the planning and carrying out of Aktion T4 at every stage. After protests from the German Catholic and Protestant churches, Hitler ordered the cancellation of the T4 program in August 1941, although the disabled and mentally ill continued to be killed until the end of the war. The medical community regularly received bodies and body parts for research. Eberhard Karl University received 1,077 bodies from executions between 1933 and 1945. The neuroscientist Julius Hallervorden received 697 brains from one hospital between 1940 and 1944: "I accepted these brains of course. Where they came from and how they came to me was really none of my business."
While Schindler operated two other factories in Krakow, only at Emalia did he employ Jewish workers who resided in the nearby Krakow ghetto. At its peak strength in 1944, Emalia employed 1,700 workers; at least 1,000 were Jewish forced laborers, whom the Germans had relocated from the Krakow ghetto after its liquidation in March 1943 to the forced labor camp and later concentration camp Krakau-Plaszow.
By the end of 1934 Hitler was in absolute control of Germany, and his campaign against the Jews in full swing. The Nazis claimed the Jews corrupted pure German culture with their "foreign" and "mongrel" influence. They portrayed the Jews as evil and cowardly, and Germans as hardworking, courageous, and honest. The Jews, the Nazis claimed, who were heavily represented in finance, commerce, the press, literature, theater, and the arts, had weakened Germany's economy and culture. The massive government-supported propaganda machine created a racial anti-Semitism, which was different from the longstanding anti-Semitic tradition of the Christian churches.
After 1945 the name was applied to the displaced persons camp established nearby, but it is most commonly associated with the concentration camp. From 1941 to 1945, almost 20,000 Soviet prisoners of war and a further 50,000 inmates died there. Overcrowding, lack of food and poor sanitary conditions caused outbreaks of typhus, tuberculosis, typhoid fever and dysentery, leading to the deaths of more than 35,000 people in the first few months of 1945, shortly before and after the liberation.