Acts of the Hieromartyr Januarius, Bishop of Benevento
- Edward P. Graham translation. At the St. Pachomius Library.
- http://www.voskrese.info/spl/januarius.html

The Martyrdom of St Januarius in the Amphitheatre at Pozzuoli
- Seventeenth-century painting by Artemisia Gentileschi.
- http://www.artemisia-gentileschi.com/martyr.html

Catholic Encyclopedia: St. Januarius
- Bishop of Beneventum, martyr, believed to have died in the Diocletian persecution, c. 305. Article has a lengthy discussion of the liquefaction of the saint's blood.
- http://www.newadvent.org/cathen/08295a.htm

The Blood of St. Januarius
- The relic and the phenomenon of the liquefaction of what is said to be the saint's blood, from a chemistry perspective.
- http://www.cicap.org/en_artic/at101014.htm

Martyrdom of Saint Januarius
- Eighteenth-century Hungarian painting, with brief comments on the artist and subject.
- http://hungart.euroweb.hu/english/p/pesce/muvek/januariu.html

Vietnamese Eucharistic Youth Society: St. Januarius
- The story of this martyred bishop. Suitable for children.
- http://www.tntt.org/vni/tlieu/saints/St0919.htm

Januarius
- Illustrated profile of the saint.
- http://www.catholic-forum.com/saints/saintj30.htm