Ballets were a regular component of performances of Italian opere serie, and occasionally also
of serenatas. Depending on local tradition, up to three different ballets might be performed in
conjunction with an opera; these were generally not composed by the opera’s composer. Exceptions
to this rule include Mozart’s ballets KV 657 for Ascanio in Alba, KV
111 and KV 367 for Idomeneo, re di Creta, K. 366. A strong
ballet tradition existed in Paris: there, Mozart composed Les petits riens,
KV 299b and drafted several other works and individual movements. Mozart also composed
music for pantomimes performed at private balls in Vienna, as well as the stage music (with
chorus) for the drama Thamos, King of Egypt, KV 345.