Time: Saturday May 1, 1773
Place: Salzburg, Austria
Details: Mozart paired with the grand old man of the world of libretto, the 74-year-old poet Metastasio. This wasn't an opera, this wasn't an oratorio, it was a 'dramatic serenade' that was performed successfully on May 1 of that year at the enthronement. Sadly, while it was definitely of high quality and certainly significant at the period, it has not survived the test of time to claim a place in the general repertoire.