Adagio and Rondo for glass harmonica, flute, oboe, viola and cello

The Adagio and Rondo, K. 617, is a quintet composed by Wolfgang Amadeus Mozart for glass harmonica, flute, oboe, viola and cello.

[1] Completed on May 23, 1791 (the date indicated in Mozart's own list of his works[2]), it was written for Marianne Kirchgessner, a blind glass harmonica virtuoso, who played the first performance in the Burgtheater Akademie on June 10, 1791, and subsequently performed it at the Kärtnertortheater on August 19, 1791.

[1] The autograph manuscript is in the British Library as part of the Stefan Zweig Collection.

It was purchased by Zweig from a Berlin auction house in 1930.

They seem to require an instrument equipped with a keyboard mechanism such as that constructed in 1784.