Metamorphosen, for 23 solo strings, Op. 142, TrV290

Metamorphosen unfolds as one continuous span of about 25 minutes, built from a handful of melodic fragments that grow, combine, and darken as they pass among the 23 individual string players. There are no separate movements or breaks to listen for, only a slow accumulation of intensity.

The piece opens low and somber, with cellos and basses laying out a grieving phrase that the other strings gradually take up and stretch. From here the music works like a set of variations without a fixed theme: fragments are turned upside down, sped up, layered against each other, so the material seems to keep changing shape, which is the "metamorphosis" of the title.

A central climax builds through thickening harmony and rising lines until the full ensemble reaches its most anguished, densely woven point. After this peak the music slowly unwinds, thinning back toward the opening mood.

Near the very end, the cellos and basses quote the funeral march theme from the second movement of Beethoven's "Eroica" Symphony, marked in the score "In memoriam." This quiet, unmistakable quotation is the moment listeners often remember, a direct acknowledgment that the piece is a lament, closing the work in the same somber key in which it began.

Strauss composed Metamorphosen in 1944 and early 1945, as allied bombing destroyed German opera houses and concert halls, including ones in Munich and Vienna that had shaped his career. Writing at the very end of his life, he channeled that loss into a work for 23 solo string players, one of the largest scores ever written for string ensemble without a conductor's usual orchestral backing. The piece closes with an unmistakable quotation from the funeral march of Beethoven's "Eroica" Symphony, marked in the score "In memoriam," confirming the music as an elegy. It was premiered in Zurich in 1946, conducted by Paul Sacher with the Collegium Musicum Zurich, and has since become one of Strauss's most performed late works, admired for its sustained, unbroken lament.