After 140 years, Wagner’s final opera, “Parsifal,” first performed at the second Bayreuth Festival in 1882, finally got its Mexican premiere in April of this year. While not quite an opera—it was defined by Wagner as an ‘Bühnenweihfestspiel,’ or a ‘stage festival play’ with a sacred focus—Wagner’s final piece testifies to his consummate understanding of opera as not just a {…}