Leo IX, Pope
- Brief hagiography.
- http://www.saintpatrickdc.org/ss/0419.htm#leo

The Ecole Glossary: Leo IX
- Brief biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/leoix.html

St. Leo IX
- Brief account of his pontificate. From Joseph Brusher's book "Popes Through the Ages."
- http://www.cfpeople.org/Books/Pope/POPEp150.htm

Leo IX, Saint, Pope
- Quick overview of his life, from the Columbia Encyclopedia, 6th ed.
- http://www.bartleby.com/65/le/Leo9-St.html

Pope St. Leo IX
- Hagiographical article on this reformer pope, who died in 1054. From the Catholic Encyclopedia.
- http://www.newadvent.org/cathen/09160c.htm

Patron Saints Index: Leo IX
- Profile of this saint, who is also known as the Pilgrim Pope.
- http://www.catholic-forum.com/saints/saintl13.htm