Verdi wrote some famous music called the "Anvil Chorus" in his opera "Il Trovatore". Wagner asked for 18 anvils in "Das Rheingold" in the scene which takes place below the earth where the Nibelungs are working at their forges. Albert Parlow wrote an "Anvil Polka", Varèse used an anvil in "Ionisation", Walton uses an anvil in "Belshazzar’s Feast" and there is an anvil in the orchestra in Howard Shore's music for "The Lord of the Rings" movie trilogy.