Totentanz : Paraphrase on Dies irae, S.126, is the name of a work for solo piano and orchestra by Franz Liszt notable for being based on the Gregorian plainchant melody Dies irae as well as for stylistic innovations. It was first planned in 1838, completed and published in 1849, and revised in 1853 and 1859.
The above text from the Wikipedia article "Totentanz (Liszt)" text is available under CC BY-SA 3.0.