Service honours music's role in helping prisoners of the Holocaust
1 February 2015 Last updated at 09:09 GMT
It is a remarkable fact that amid the horrors of the Nazi concentration camps, some prisoners still found the will, and the means, to write and play music.
On Sunday, some of those works will be honoured at a service in Westminster Abbey.
The service is part of the series of commemorations that have marked the 70th anniversary of the liberation of Auschwitz.
And some of the music is being performed for the first time in the UK.
Tim Muffett reports.