Pope Saint Pius X (Italian: Pio X), born Giuseppe Melchiorre Sarto,(2 June 1835 – 20 August 1914) was Pope from August 1903 to his death in 1914.
- Acerbo Nimis (On Teaching Christian Doctrine) – April 15, 1905Ereader Files: English [ MOBI– EPUB ]
- Ad Diem Illum Laetissimum (On the Immaculate Conception) – February 2, 1904Ereader Files: English [ MOBI– EPUB ]
- Communium Rerum (On St. Anselm of Aosta) – April 21, 1909Ereader Files: English [ MOBI– EPUB ]
- Divino Afflatu (Reform of the Roman Breviary) – November 1, 1911Ereader Files: Latin [ MOBI– EPUB ]
- E Supremi (On the Restoration of All things in Christ) – October 4, 1903Ereader Files: English [ MOBI– EPUB ]
- Editae Saepe (On St. Charles Borromeo) – May 26, 1910Ereader Files: English [ MOBI– EPUB ]
- FOR THE FIFTIETH ANNIVERSARY OF THE PROCLAMATION OF THE DOGMA OF THE IMMACULATE CONCEPTION () – December 12, 1904Ereader Files: English [ MOBI– EPUB ]
- Gravissimo Officii Munere (On French Associations of Worship) – August 10, 1906Ereader Files: English [ MOBI– EPUB ]
- Haerent Animo () – August 4, 1908Ereader Files: English [ MOBI– EPUB ]
- Iamdudum (On the Law of Separation in Portugal) – May 24, 1911Ereader Files: English [ MOBI– EPUB ]
- Il Fermo Proposito (On Catholic Action in Italy) – June 11, 1905Ereader Files: English [ MOBI– EPUB ]
- Iucunda Sane (On Pope Gregory the Great) – March 12, 1904Ereader Files: English [ MOBI– EPUB ]
- Lacrimabili Statu (On the Indians of South America) – June 7, 1912Ereader Files: English [ MOBI– EPUB ]
- Lamentabili Sane () – July 3, 1907Ereader Files: English [ MOBI– EPUB ]
- Notre Charge Apostolique (Our Apostolic Mandate) – August 15, 1910Ereader Files: English [ MOBI– EPUB ]
- Pascendi Dominici Gregis (On the Doctrine of the Modernists) – September 8, 1907Ereader Files: English [ MOBI– EPUB– ] Spanish [ MOBI– EPUB ]
- Pieni L’animo (On the Clergy in Italy) – July 28, 1906Ereader Files: English [ MOBI– EPUB ]
- Pope St. Pius X () – April 20, 1914Ereader Files: Latin [ MOBI– EPUB– ] English [ MOBI– EPUB ]
- Praestantia Scripturae (On the Bible Against the Modernists) – November 18, 1907Ereader Files: English [ MOBI– EPUB ]
- Quam Singulari () – August 8, 1910Ereader Files: English [ MOBI– EPUB ]
- Septimo Iam ((Resolving certain controversies among the Orders of Friars Minor) Latin/English parallel texts) – October 4, 1909Ereader Files: English [ MOBI– EPUB– ] Latin [ MOBI– EPUB ]
- Singulari Quadam (On Labor Organizations) -Ereader Files: English [ MOBI– EPUB ]
- The Oath Against Modernism () – September 1, 1910Ereader Files: English [ MOBI– EPUB ]
- Tra Le Sollecitudini ((On Sacred Music)) – November 22, 1903Ereader Files: Arabic [ MOBI– EPUB ]
- Tribus Circiter (On the Miravites: Mystic Priests of Poland) – April 5, 1906Ereader Files: English [ MOBI– EPUB ]
- Une Fois Encore (On the Separation of Church and State) – January 6, 1907Ereader Files: English [ MOBI– EPUB ]
- Vehementer Nos (On the French Law of Separation) – February 11, 1906Ereader Files: English [ MOBI– EPUB ]