Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Henry Iv Letter to Gregory Vii
Contains the full text of Henry IV's response to Gregory VII after being called a "usurper," in which Henry refers to Gregory IV as a "false monk."
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Ban on Lay Investitures
Contains the full text of Gregory VII's decrees which banned lay investiture.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Lay Investitures Forbidden
Contains the full text of Gregory VII's decree banning investitures.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: First Banning of Henry Iv
Contains the original text of Gregory VII's first order to excommunicate Henry IV.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Second Banning of Henry Iv
Contains the original text of Gregory VII's second order to excommunicate Henry IV.
Society of Archbishop Justus
Catherine of Sienna, Reformer and Spiritual Teacher
This biography of Saint Catherine of Sienna (1347-1380 CE) includes a prayer to her at the bottom of the page.
Global Catholic Network
Global Catholic Network: St. Catherine of Sienna, Virgin
This biography of St. Catherine of Sienna (1347-1380 CE) closes with a commentary on the differences between saints and ordinary people.
New Advent
Catholic Encyclopedia: St. Catherine of Siena
This biography of Catherine of Sienna (1347-1380 CE) includes links to information about many significant people or terms. Please note that "The Catholic Encyclopedia," is a historic reference source and should be viewed in the context...