The Piano Quintet in E-flat minor, Op.87, is a composition by the Austrian composer Johann Nepomuk Hummel.
Composed in 1802, it was not published until around 1822 and might have served as an example cited by Sylvester Paumgartner who commissioned Hummel’s friend Schubert to write his own piano quintet.
[1] The piece is written for a then-common combination of instruments in a piano quintet; namely, the piano is joined by violin, viola, cello and double bass[2] (the double bass is replaced with another violin, much like a string quartet, in later piano quintets).
Perhaps, along with Schubert's Trout Quintet, the two are the most famous pieces written for such a combination.
This article about a composition for a chamber music group is a stub.