Composed in 1901-02, Mahler's 5th Symphony contains the Adagietto movement scored for strings and harp, perhaps the most serene, simple, spiritual and peaceful music of his entire output. The music was likely composed as a love song to his new wife Alma.
Ralph Sauer has beautifully arranged the movement for solo Trombone with Piano accompaniment. The 8 minute long work is appropriate for advanced performers.