For 10 points, name this event memorialized by Schoenberg's A Survivor From Warsaw and Gorecki's Symphony of Sorrowful Songs, the latter of which uses text written on the wall of a Gestapo prison cell.
One musical work about this event is a Dies Irae whose chorus chants words over an improvised rhythmic framework. That work was written by Krzysztof Penderecki. The second movement of Steve Reich's Different Trains is set during this event, which also inspired a work whose final movement quotes the folk song "He lies in a grave, I know not where". A Sprechstimme work that ends with the singing of the Shema Yisroel tells a story of this event. For 10 points, name this event memorialized by Schoenberg's A Survivor From Warsaw and Gorecki's Symphony of Sorrowful Songs, the latter of which uses text written on the wall of a Gestapo prison cell.
One musical work about this event is a Dies Irae whose chorus chants words over an improvised rhythmic framework.
the Holocaust [prompt on less specific stuff like World War II]