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

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