Erlkönig (D. 328, Op. 1, 1815) is one of Schubert's most celebrated Lieder, a dramatic setting of Goethe's supernatural ballad depicting a father racing through the night to save his dying child from the Erl King. Schubert wrote it at age 17, and the piano's relentless triplets combined with distinct vocal characterizations for narrator, father, child, and Erl King make it a supreme test of both singer and accompanist.
Source
Public Domain