I have never done this before, but I am going to post an entire opera. This is the fabled Lisbon Traviata that Callas sang in Lisbon (hence the name) with a young Alfredo Kraus. This audio must come from a pirated recording because, to the best of my knowledge, there were no broadcast recordings of this performance. The recording is missing the last 5 to 7 minutes of the performance. If you have the time, it is well worth listening to this performance. A version of the libretto is below.

La Traviata, Giuseppi Verdi