Eventyr (Once Upon a Time) is a tone poem for orchestra composed by Frederick Delius in 1917.
"Eventyr" means "adventure", and the inspiration for the piece was a fairy tale from Norway.
After a twenty-bar introduction, a fantastic theme is played first by the bassoons and then by the other woodwinds.
Several climactic moments follow before the creation of a fairy world, dominated by a descending chromatic theme for strings, celesta, and harp.
The piece is concluded with the return of earlier material, followed by a quiet closing section.