Question: Which of Tristan und Isolde and Saint François d'Assise was written first?
Sentence (from "Tristan und Isolde"): Tristan und Isolde ("Tristan and Isolde", or "Tristan and Isolda", or "Tristran and Ysolt") is an opera, or music drama, in three acts by Richard Wagner to a German libretto by the composer, based largely on the romance by Gottfried von Strassburg.
Relevant evidence: Yes