- Dogmatic Canons and Decrees of the Council of Trent, Vatican Council I, Plus the Decree on the Immaculate Conception and the Syllabus of Errors
- Ineffabilis Deus: Defining the Dogma of the Immaculate Conception: Apostolic Constitution of Pius IX, Issued December 8, 1854
- Encyclical: Quanta Cura & The Syllabus of Errors
- Qui Pluribus : On Faith and Religion
- Discorsi ...