A concert to mark the 70th anniversary of Kristallnacht, the 1938 German pogrom, was held in London on Tuesday.
Endorsed by the leaders of all three main political parties, the event was organised by the Holocaust Centre, home to the Aegis Trust for genocide prevention, in memory of Kristallnacht, "the night of broken glass".
On November 9, 1938, more than 90 Jews were murdered and 25,000-30,000 were deported to labour camps. Kristallnacht is now recognised as the precursor to the destruction of the Jews of Europe.
Prime Minister Gordon Brown said the concert was a chance "to reflect on an event that shocked the world.
"It is also a chance to celebrate to work of the Holocaust Centre, which both teaches about the horrors of the Nazi holocaust and promotes community cohesion, challenging modern day prejudice and discrimination in all its forms."
Tory leader David Cameron said: "In educating people about the past, promoting cohesion in the present and helping us to reflect on our shared responsibilities to prevent mass atrocities in the future, the Holocaust Centre and the Aegis Trust are playing a vital role."