Pietro Mascagni | Pietro Bembo | Pietro da Cortona | Ponte San Pietro | The Battle of San Pietro | Pietro Tacca | Pietro Perugino | Pietro Canonica | Pietro Annigoni | San Pietro in Casale | Pietro Tenerani | Pietro Tagliavia | Pietro Frua | Pietro Consagra | San Pietro in Ciel d'Oro | Pietro Verri | Pietro Scalia | Pietro Lombardi | Pietro Gori | Pietro Delitala | Pietro de' Crescenzi | Pietro Badoglio | Pietro Paolo Cristofari | Pietro Nobile | Pietro Musumeci | Pietro IV Candiano | Pietro Garinei | Pietro Della Valle | Pietro Cascella | Pietro Aretino |
It is an explanation of the doctrine of Infallibility as taught by the Italian "Ultramontane" theologians, such as Bellarmine in the sixteenth century, Pietro Ballerini in the eighteenth century and Giovanni Perrone in the nineteenth century.