Eighty years after the liberation of Auschwitz, genocide, the persecution of millions of people because of their origin, war and even the possible use of nuclear weapons are once again considered “normal.

About 50 survivors of the Nazi death camp at Auschwitz-Birkenau will return to the site on Monday to remember the day it was finally liberated on 27 January 1945. They will be joined by heads of state including King Charles and other European royalty, Emmanuel Macron of France and German President Frank-Walter Steinmeier.

Officials say the commemorative event marking the 80th anniversary of Auschwitz's liberation could be the last of its kind.