Qui Pluribus – On Faith and Religion (Pius IX – 1846)
Quibus Quantisque Malis – Allocution to the Consistory of Cardinals (Pius IX – 1849)
Multiplices Inter Machinationes – Allocution Condemning Freemasonry (Pope Pius IX – 1865)
Etsi Multa – On the Church in Italy, Germany, and Switzerland (Pope Pius IX – 1873)
Catholic Audio Files 