What is the most famous song from Tristan and Isolde?

The opera's most sublime music appears in its final scene, famously known as the "Liebestod" or "Love-Death." Wagner preferred to call this climactic moment Isolde's Verklärung—a term meaning "transfiguration" or "achieving enlightenment."

Nineteenth-century conductor Hans von Bülow proclaimed the work "the pinnacle of musical achievement to date!"