Columbia Encyclopedia: Louis IX, king of France: A short biographical article on St. Louis, with links to related topics.
James Kiefer's Christian Biographies: Louis IX, King of France: With prayer in traditional and contemporary language.
Memoirs of Saint Louis: Biography of St. Louis by a contemporary, Jean de Joinville.
Patron Saints Index: Louis IX: Illustrated profile of St. Louis, also known as Louis Capet.
Saint Louis, Confessor, King of France: From the book "Lives of Saints," published by John J. Crawley.
Saint Louis, King of France, 1214 - 1270: Illustrated biography of St. Louis, by Eloise Wilding.
St. Louis IX: Biographical article on St. Louis, King of France, d. 1270. In the Catholic Encyclopedia.
The Ecole Glossary: Louis IX: Short biography of St. Louis, by Melissa Smeltzer.
The Hours of Saint Louis: A book of hours made for his great-granddaughter included prayers in honor of the sainted king. Illumination depicting St. Louis, and explanation.