John XXIII

Antipope · Pisa line. Pisan claimant; reclassified as antipope.

Writings

Pacem In Terris
11 Apr 1963 Landmark Read here

Landmark encyclical on peace, human rights, and order among nations, addressed also to “all men of good will.”
Paenitentiam Agere
July 1, 1962 Read here
Veterum Sapientia [ English ] [ Latin ]
February 22, 1962 Read here
Aeterna Dei Sapientia
November 11, 1961 Read here
Le voci che da tutti
March 19, 1961 Read here
Mater Et Magistra
15 May 1961 Landmark Read here

On Christianity and social progress — updating the Church’s social teaching for the postwar world.
Religiosorum institutio
February 2, 1961 Read here
On Promoting Devotion to the Most Precious Blood
June 6, 1960 Read here
Ad Petri Cathedram
29 Jun 1959 Read here

First encyclical of John XXIII: truth, unity, and peace under Peter’s chair.
Apostolic Letter issued "Motu Proprio" Boni Pastoris establishing the Pontifical Commission for Motion Pictures, Radio and Television
February 22, 1959 Read here
Grata Recordatio
September 26, 1959 Read here
Princeps Pastorum
November 28, 1959 Read here
Sacerdotii Nostri Primordia
August 1, 1959 Read here