Triple Concerto in C major, op. 56

Ludwig van Beethoven's Concerto for Violin, Cello, and Piano in C major, Op. 56, commonly known as the Triple Concerto, was composed from 1803 to 1804, or beyond, and published in 1807 by Breitkopf & Härtel. The choice of the three solo instruments effectively makes this a concerto for piano trio, and it is the only concerto Beethoven ever completed for more than one solo instrument, and the only one he wrote for cello.
A typical performance takes about 37 minutes.