Das Rheingold , WWV 86A, is the first of the four operas that constitute Richard Wagner's Der Ring des Nibelungen ('The Ring of the Nibelung'). It was first written as an introduction to the tripartite Ring, but the cycle is now generally regarded as consisting of four individual operas.
Die Walküre (The Valkyrie), WWV 86B, is an drama in three acts by Richard Wagner with a German libretto by the composer. It is the second of the four operas that form Wagner's cycle Der Ring des Nibelungen (The Ring of the Nibelung).
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