Mozart’s Don Giovanni is a very famous opera. Some say that it is the greatest opera ever written. It is about the adventures of the libertine Don Giovanni. I have given a simple synopsis through the end of Act I below. This very famous trio takes place at the ending of Act I. Two of the singers, Leyla Gencer and Teresa Stich-Randall, have had postings of at least some of their works. Luigi Alva has never had a post made specifically about him.
Just to touch on the Mozart again, Don Giovanni is a comedy and an opera seria (that should be obvious as to meaning). One very interesting thing about Don Giovanni himself is that he is never given an aria to express his innermost self. Mozart did that on purpose, and it makes the Don Giovanni character either more or less complex.