Encyclical letter (Ad Petri cathedram) of His Holiness John XXIII by Divine Providence Pope to His Venerable Brethren the Patriarchs, Primates, Archbishops, Bishops, and all other local Ordinates that are at peace and in communion with the Apostolic See, and to the clergy and faithful of the Catholic world, concerning the attainment of truth, unity, and peace in the spirit of love.

Míreanna comhchosúla

• Germany-- pilgrimage of unity and peace /
  de réir: John Paul II, Pope, 1920-2005
  Cruthaithe: (1981)
• Encyclical letter of Our Most Holy Lord Pius IX : by divine providence Pope, to all patriarchs, primates, archbishops, and other ordinaries in the grace and communion of the Apostolic See
  de réir: Pius IX, Pope, 1792-1878
  Cruthaithe: (1874)
• Encyclical letter (Divini Redemptoris) of His Holiness Pius XI to his venerable brethren the patriarchs, primates, archbishops, bishops, and other ordinaries in peace and communion with the Apostolic See on atheistic communism.
  Cruthaithe: (1946)
• Message of His Holiness Pope Paul VI for the celebration of the Day of Peace : Reconciliation - The way to peace.
  Cruthaithe: (1975)
• Message of His Holiness Pope Paul VI for the celebration of the Day of Peace : Reconciliation - The way to peace.
  Cruthaithe: (1975)