Symphony no. 9 in D minor, op. 125

Symphony No. 9 in D minor, Op. 125 is the ninth symphony by Ludwig van Beethoven, composed and first performed in 1824. The work expands the scope of orchestral writing by introducing vocal soloists and a chorus in its final movement, combining classical forms with late-Romantic harmonic and structural innovations and acting as a culminating piece of Beethoven's late period that influenced later symphonic practice.