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Tristan und Isolde (Tristan and Isolde) is an opera in three acts by Richard Wagner to a German libretto by the composer, based on the romance by Gottfried von Strassburg, which in turn was based on the story of Tristan and Isolde incorporated into Arthurian legend from earlier interpretations of...
Tristan and Isolde was the first opera to be finished after Wagner had published his many theories, and it was their completest refutation.
Isolde, half-crazed, tells the whole story as it occurred previous to the rising of the curtain—how she nursed the wounded Tristan, found him to be the slayer of her betrothed, took his sword and was about to kill him, when he opened his eyes, and the sword dropped from her listless fingers.