More than a million people disappeared through the gates of Auschwitz never to leave.
ITV News Presenter Mark Austin remembers some of those victims:
A new wave of antisemitism in Belgium sits uncomfortably alongside the ceremonies to remember the liberation of Auschwitz 70 years ago.
Auschwitz survivor Alina Dabrowska was a victim of the cruel experiments of Nazi doctor Josef Mengele, known as "the Angel of Death."
Here are just some of the faces and stories of Auschwitz survivors 70 years on from the concentration camp's liberation.