‘Nazism and the ghetto’ describes how the idea of the ghetto persisted alongside actual segregation during the Holocaust, with persecuted Jews seeing historic ghettos as part of their experience of an unprecedented genocide. The Łódź Ghetto included a powerful workforce under the leadership of Chaim Rumkowski which contributed to the German economy. The Warsaw Ghetto, which was larger, more diffuse, and dependent on a black market, became a site of uprising and revolt. The Nazis exploited the multiple meanings of ‘ghetto’ to portray Theresienstadt, a ‘model’ ghetto, as particularly benign for an international audience. There were many hundreds of Nazi ghettos during the war—some large, some small, some short-lived, and some lasting for years. All of them contributed to the Holocaust.