Richard Wagner - Die Walküre

https://en.wikipedia.org/wiki/Die_Walk%c3%bcre
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Die Walküre (German pronunciation: [diː valˈkyːʁə]; The Valkyrie), WWV 86B, is the second of the four epic music dramas that constitute Richard Wagner's Der Ring des Nibelungen (English: The Ring of the Nibelung). It was performed, as a single opera, at the National Theatre Munich on 26 June 1870, and received its first performance as part of the Ring cycle at the Bayreuth Festspielhaus on 14 August 1876.