On 4 May 1959 Pope John XXIII founded the Confederation of the Canons Regular of St. Augustine with his apostolic letter "Caritas Unitas" on the 900th anniversary of the First Lateran Synod. Le 4 mai 1959, le pape Jean XXIII fonde la confédération des chanoines réguliers de saint Augustin avec le bref apostolique "Caritas Unitas".
