500
This dark and symbolic melody from Gregorian Chant has been quoted frequently by composers including Berlioz, Holst, Gounod, Haydn, Brahms, Liszt, Khachaturian, Mahler, Mussorsky, Rachmaninioff, Respighi, Saint-Saens, Shostakovich, Tchaikovsky, and many others.
What is the Dies Irae?