The largest group of victims were Jewish people.
It is estimated about 6 million died - nearly 7 out of every 10 Jews living in Europe.
The Nazis also killed other large groups of people who they thought were inferior races. We will never know exactly how many died but there were many millions of non-Jewish victims. including:
- Civilians and soldiers from the Soviet Union
- Catholics from Poland
- Romany Gypsies
- Disabled people
- Jehovah's Witnesses
They also murdered politicians, journalists, teachers and anyone else who spoke out against Hitler.