The opera "Tristan and Isolde" premiered in 1865 and is considered its composer's best stand-alone piece. What is the name of the composer?

Explanation

Wilhelm Richard Wagner (1813-1883) was a German composer, best known for his operas. Wagner was born in Leipzig and died in Venice. He wrote "Der fliegende Holländer" (1843), "Tristan und Isolde" (1865), "Parsifal" (1822) and the four operas in the "Der Ring des Nibelungen" (1848-1874): "Das Rheingold", "Die Walküre", "Siegfried" and "Götterdämmerung". The tetralogy is based on characters and themes from Norse mythology.