Des Knaben Wunderhorn (The Boy’s Magic Horn) is a series of songs with music by Gustav Mahler, set either for voice and piano, or for voice and orchestra, based on texts of German folk poems chosen from a collection of the same name assembled by Achim von Arnim and Clemens Brentano and published by them, in heavily redacted form, between 1805 and 1808.
A collection of 12 of these was published in 1899, under the title Humoresken ('Humoresques'), and formed the basis of what is now known simply (and somewhat confusingly) as Mahler's 'Songs from "Des Knaben Wunderhorn"'.
2 (1888–1894) as the work's fourth movement; "Es sungen drei Engel", by contrast, was specifically composed as part of Symphony No.
Other songs found themselves serving symphonic ends in other ways: a voiceless version of "Des Antonius von Padua Fischpredigt" forms the basis of the scherzo in Symphony No.
Poems from the same collection have also been set as Lieder by several composers, including Mendelssohn, Schumann, Loewe, Brahms, Schoenberg, Webern, and Zemlinsky.