Fausto Appetente Die
- On St. Dominic. Encyclical promulgated in 1921, commemorating the seventh centenary of the saint's death.
- http://www.papalencyclicals.net/Ben15/b15fadie.htm

Spiritus Paraclitus
- Encyclical on St. Jerome. Promulgated 15 September, 1920.
- http://www.papalencyclicals.net/Ben15/b15spiri.htm

Pope Benedict XV's Peace Proposal
- Excerpts from a proposal issued 1 August, 1917.
- http://www.lib.byu.edu/~rdh/wwi/1917/popeace.html

Principi Apostolorum Petro
- On St. Ephrem the Syrian. Encyclical promulgated in 1920, names Ephrem a Doctor of the Universal Church.
- http://www.ewtn.com/library/ENCYC/B15PRAPP.HTM