String Quintet No.2 Kv.406 mov.3
Mozart tried to incorporate a canon into the minuet in this piece, and later used it in the third movement of Symphony No. 40.
A part - Minuetto in Canone. (Soprano -> Bass)
B part - Trio al rovescio. (Alto -> Soprano, Tenor -> Bass)
In this piece, Mozart demonstrates a sophisticated compositional technique that is both an inverse canon and a double canon.
http://aeolianconsort.chakin.com/Mozart.htm
