Wagner called the prelude the "Liebestod" (Love-death) while Isolde's final aria "Mild und leise" he called the "Verklärung" (). In 1867 his father-in-law Franz Liszt made a piano transcription of "Mild und leise", which he called "Liebestod" (S.447); he prefaced his score with a four-bar motto from the love duet from act 2, which in the opera is sung to the words "sehnend verlangter Liebestod". Liszt's transcription became well known throughout Europe well before Wagner's opera reached most places, and it is Liszt's title for the final scene that persists. The transcription was revised in 1875.