I found this really interesting because I always thought that Rossini was what we would call now a "liberal" whilst Pius was ultra-conservative. His primary works that he is remembered for was Vatican I which defined Papal Infallability and his "Syllabus of Errors" where he condemned just about everything that was going on in modern Europe at the time. In fact British commentators at the time said that the Italians called him "Pio nono" because everything was a "NO-NO".
Putting that all aside, I'm more interested in Pius' personal habits. For instance he was the last pope that we know of who was a chain smoker, and an Italian perfume maker recently reconstructed his personal deoderant. (The Papacy is so interesting!!).
Anyway I hope our readership enjoys the cantata, with visuals from the Pius IX museum and very mid-19th century type of music, with lots of ornamentation.