For All the Saints: Agatho
- Biography.
- http://www.saintpatrickdc.org/ss/0110.htm

The Ecole Glossary: Agatho
- Brief account of his pontificate, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/agatho.html

St. Agatho
- Character sketch and an account of his pontificate.
- http://www.cfpeople.org/Books/Pope/POPEp79.htm

Pope St. Agatho
- Short article on St. Agatho the Wonderworker, a Sicilian believed to have been a Benedictine monk and over 100 years old at the time of his election. He died in 681. From the Catholic Encyclopedia.
- http://www.newadvent.org/cathen/01204c.htm