Final answer:
Auschwitz is the most infamous camp used by the Nazis for propaganda, known for its systematic murder of millions, gas chambers, and brutal experiments.
Explanation:
The most well-known camp used by the Nazis for propaganda is Auschwitz. Auschwitz was a concentration and extermination camp where millions of people, mostly Jews, were systematically murdered. It gained notoriety for its use of gas chambers, crematoriums, and as a site for gruesome medical experiments. The camp's gate sign reading 'Arbeit Macht Frei' ('Work will set you free') symbolized the deception and cruelty of the Nazi regime.
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