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In page Kudrun:

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Perhaps for the same reasons that the epic was unpopular as heroic poetry in the Middle Ages, namely its literary character, the Kudrun became extremely popular with nineteenth-century philologists.[5] This resulted in the work being adapted several times. In 1868, author Mathilde Wesendonck published a play Gudrun, which was among her more popular pieces and which Johannes Brahms offered to base an opera on.[6] Several operas based on the poem were actually completed: Carl Amand Mangold completed one in 1849, as did Oscar Block in 1865, August Reissmann in 1871, Felix Draeseke in 1883, and Hans Huber in 1894.[7]