John I, Pope
- Short biography.
- http://www.saintpatrickdc.org/ss/0518.htm#john

St. John I
- Brief biography of the pope, by Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp53.htm

John I
- Short biography of the pope, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/johni.html

Pope St. John I
- A Tuscan, was warmly received in Constantinople, but upon his return to Rome, was imprisoned by King Theodoric. Pope John died in prison in 526.
- http://www.newadvent.org/cathen/08421a.htm

Pope John I
- Profile.
- http://www.catholic-forum.com/saints/saintj37.htm