Dozens of world leaders – including Russian president Vladimir Putin and Prince Charles, have gathered in Jerusalem at Yad Vashem – the memorial to the Holocaust – declaring that they all bear a responsibility to make sure the terrible tragedies of the past are never repeated.
On the 75th anniversary of the liberation of the Auschwitz death camp, where over a million people were murdered at the hands of the Nazis, there were stark warnings about the rise of modern anti-semitism and xenophobia.
Here are some of their tributes, as well as some searing images from the Holocaust.