Symphony No.9 which has a choral finale.
Yes.
Well you've answered the question yourself. Beethoven added vocal chorus for the first time into a symphony. This was an unprecedented and very odd choice at the time. Since then, it has had a moderate effect on future symphonies but nothing too drastic.
None of Beethoven's symphonies has a piano part. He wrote five concertos for piano accompanied by orchestra, and a Fantasy for piano, chorus and orchestra.
The fifth Symphony
Fifth Symphony
Beethoven's last symphony marked the first time that voices had been used in a symphony. This is now called a choral symphony. Symphony No. 9 is widely considered to be Beethoven's finest work and among the best pieces music ever written by anyone.
Beethoven's Symphony in d minor, opus 125 is called the choral, because of his use of soloists and chorus in the fourth movement set to Schiller's Ode to Joy. Beethoven was the first composer to include vocalists in a symphony. Others have done so since then, notably Gustav Mahler.
Beethoven's most famous symphony was his fifth and ninth.
London Symphony Chorus was created in 1966.
Chicago Symphony Chorus was created in 1957.
Yes
Beethoven started this work in 1818 and it was completed in 1824. Beethoven's sketchbooks are also showing that the first bits of material that appeared in the symphony were written in 1811. This symphony is also the last symphony beethoven composed.