  |
Catholic Encyclopedia - http://www.newadvent.org/cathen/03144c.htm
Pope St. Caius, d. 296 after twelve years as bishop of Rome. |
| |
Popes Through the Ages - http://www.cfpeople.org/Books/Pope/POPEp28.htm
Short biography of Pope St. Caius, from the book by Joseph Brusher. |
 |
The Ecole Glossary - http://www2.evansville.edu/ecoleweb/glossary/gaius.html
Brief article on Pope St. Gaius, by Karen Rae Keck. |