The Piano Trio No. 7 in B-flat major, Op. 97, by Ludwig van Beethoven is a piano trio for piano, violin, and cello, published in 1811. It is commonly referred to as the Archduke Trio, because it was dedicated to the amateur pianist and composition student of Beethoven, Archduke Rudolph of Austria.
It was written during the “middle” period of Beethoven’s compositional career, which spans approximately 1803 until 1814. Composition began in the summer of 1810 and it was completed in March 1811.