The Oath Against Modernism
- Was to be sworn by all clergy, preachers, religious superiors, and seminary professors. Issued 1 September, 1910.
- http://www.papalencyclicals.net/Pius10/p10moath.htm

Praestantia Scripturae
- Motu proprio on the decisions of the Pontifical Biblical Commission and on prescriptions against the errors of the modernists. Issued 18 November, 1907.
- http://www.papalencyclicals.net/Pius10/p10prasc.htm

Anniversary Allocution (Excerpts)
- On the fiftieth anniversary of the proclamation of the dogma of the Immaculate Conception. 12 December, 1904.
- http://www.papalencyclicals.net/Pius10/p10aniv.htm

Lamentabili Sane
- Syllabus Condemning the Errors of the Modernists. Issued 3 July, 1907.
- http://www.papalencyclicals.net/Pius10/p10lamen.htm

Haerent Animo
- Apostolic Exhortation addressed to the Catholic clergy, on priestly sanctity. Issued 4 August, 1908.
- http://www.papalencyclicals.net/Pius10/p10haer.htm