Pope St. Pius X
Aug. 4, 1903 - Aug. 20, 1914

• Acerbo Nimis (On Teaching Christian Doctrine) April 15, 1905
• Ad Diem Illum Laetissimum (On the Immaculate Conception) February 2, 1904
• Communium Rerum (On St. Anselm of Aosta) April 21, 1909
• Divino Afflatu [Apostolic Constitution] Reform of the Roman Breviary  November 1, 1911 [Latin]
• Dogma of the Immaculate Conception December 12, 1904. [Anniversary Allocution]
• E Supremi (On the Restoration of All things in Christ) October 4, 1903
• Editae Saepe (On St. Charles Borromeo) May 26, 1910
• Fiftieth Anniversary of the Delaration of the Dogma of the Immaculate Conception December 12, 1904
• Gravissimo Officii Munere (On French Associations of Worship) August 10, 1906
• Haerent Animo August 4, 1908 [Apostolic Exhortation]
• Iamdudum (On the Law of Separation in Portugal) May 24, 1911
• Il Fermo Proposito (On Catholic Action in Italy) June 11, 1905
• Iucunda Sane (On Pope Gregory the Great) March 12, 1904
• Lacrimabili Statu  (On the Indians of South America) June 7, 1912
• Lamentabili Sane July 3, 1907
• Notre Charge Apostolique [Apostolic Letter] (Our Apostolic Mandate) August 15, 1910
• The Oath Against Modernism September 1, 1910
• Pascendi Dominici Gregis (On the Doctrine of the Modernists) September 8, 1907 [English] [Spanish]
• Pieni L'animo (On the Clergy in Italy) July 28, 1906
• Praestantia Scripturae (On the Bible Against the Modernists) November 18, 1907
• Quam Singulari August 8, 1910 [Sacred Congregation]
• Septimo Iam: October 4, 1909 A.D. (Resolving certain controversies among the Orders of Friars Minor) Latin/English parallel texts
• Singulari Quadam (On Labor Organizations) September 24, 1912
• Tra Le Sollectiudini - (On Sacred Music)  November 22, 1903 [Motu Proprio]
• Tribus Circiter (On the Miravites: Mystic Priests of Poland) April 5, 1906
• Une Fois Encore (On the Separation of Church and State) January 6, 1907
• Vehementer Nos (On the French Law of Separation) February 11, 1906