They are called 'Milanese' because Mozart composed them in Milan while he was working on his opera Lucio Silla.
The quartets are written in a plan of keys of D–G–C–F–B♭–E♭ following the circle of fourths.
The finales are generally lightweight, whether in the form of minuets or rondos.
The autograph manuscript of the quartets is preserved in the Berlin State Library.
[2] This article about a composition for a chamber music group is a stub.