We would like to thank Crown Family Philanthropies, Abe and Ida Cooper Foundation, the Claims Conference, EVZ, and BMF for supporting the ongoing work to create content and resources for the Holocaust Encyclopedia. View the list of donor acknowledgement.
In the fall of 1940, German authorities established a ghetto in Warsaw, Poland’s largest city with the largest Jewish population. Almost 30 percent of Warsaw’s population was packed into 2.4 percent of the city's area.
Learn more about personal experiences during the Holocaust
![Blanka Rothschild holds one of her prewar family photographs. [LCID: athbr039]](https://encyclopedia.ushmm.org/images/thumb/11721704-922d-4af9-8e09-16ab9e4123c5.jpg)
Explore a timeline of events that occurred before, during, and after the Holocaust.
How and why was the Holocaust possible?
