Ad Petri Cathedram (On Truth, Unity, and Peace)
Papal encyclical
By: Pope John XXIII
Date: June 29, 1959
Source: Papal Encyclicals Online. Ad Petri Cathedram Encyclical of Pope John XXIII "On Truth, Unity and Peace, in a Spirit of Charity." Available online at http://www.geocities.com/papalencyclicals/John23/j23petri.h... (accessed February 10, 2003).
About the Author: Pope John XXIII (1881–1963) was born in Sotto il Monte, Italy, as Angelo Giuseppe Roncalli. Ordained a priest in 1904, he was a chaplain during World War I. In 1925, he became an archbishop and served as an apostolic delegate to Bulgaria, Turkey, and Greece. In 1953, he was appointed patriarch of Venice. In 1958, he was elected pope and served to 1963. He summoned the Second Vatican Council to update the church and promote ecumenism.
Introduction
The...
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1950's Religion Primary Sources
The 1950's: Primary Sources
