Encyclopædia Britannica: Cornelius
- Biographical sketch of the exiled pope. In the 11th edition (1911).
- http://encyclopedia.jrank.org/COR_CRE/CORNELIUS.html

Catholic Online: St. Cornelius
- Biographical portrait.
- http://www.catholic.org/saints/saint.php?saint_id=421

The Ecole Glossary: Cornelius
- Short biography of the pope, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/cornelius.html

Popes Through the Ages: St. Cornelius
- Account of his pontificate.
- http://www.cfpeople.org/Books/Pope/POPEp21.htm

Patron Saints Index: Cornelius
- Illustrated profile. With links.
- http://www.catholic-forum.com/saints/saintc32.htm

Pope Cornelius
- Had to contend with the antipope Novatian. When persecution broke out, Cornelius was exiled, and he died a martyr in 253.
- http://www.newadvent.org/cathen/04375c.htm