Pope Saint Martin I
- Sketch of the saint's life, by Terry Matz.
- http://www.catholic.org/saints/saint.php?saint_id=80

Martin I, Pope
- Biography.
- http://www.saintpatrickdc.org/ss/0413.htm#mart

The Ecole Glossary: Martin I
- Short biography of Pope St. Martin I, martyr.
- http://www2.evansville.edu/ecoleweb/glossary/martini.html

Martin I, Saint, d. 655?, Pope
- Biographical entry in the Columbia Encyclopedia, 6th ed.
- http://www.bartleby.com/65/ma/MartinI.html

St. Martin I
- Biographical portrait, by Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp74.htm

Pope St. Martin I
- Opposed the Monothelites, who were supported by the emperor. He was taken prisoner to Constantinople, but refused to sign a heretical declaration. He died in exile in 655. Biographical article in the Catholic Encyclopedia.
- http://www.newadvent.org/cathen/09723c.htm

The Life of St. Eligius
- Within this work by St. Ouen (Dado) is a mini-biography of his contemporary--Pope St. Martin I. Scroll to Book I, paragraph 33, or search for: "these wonderful works".
- http://www.fordham.edu/halsall/basis/eligius.html

Patron Saints Index: Martin I
- Illustrated profile.
- http://www.catholic-forum.com/saints/saintm28.htm