Ariadne auf Naxos - Haus für Mozart, 29 July 2012 (Salzburg Festival)
Most of us know Ariadne auf Naxos only as the familiar prologue-plus-opera. But this was put together only after the failure of an earlier version in which Molière's play Le bourgeois gentilhomme replaced the prologue. Or not quite. Conveniently for Strauss and Hofmannsthal's purposes, the original play was performed to musical accompaniment, incorporates ballets, and cues a musical entertainment at the end.
However Hofmannsthal saw fit to adapt it further. He added a final scene (later expanded to become the prologue) to explain the opera's content, cut dialogues and reassigned lines.