Encyclicals (Pius XII)

Summi Pontificatus – Encyclical Letter of the Supreme Pontiff On the Unity of Human Society (Pius XII – Oct. 20, 1939)

Sertum Laetitiae – Encyclical Letter of the Supreme Pontiff On the Hundred and Fiftieth Anniversary of the Establishment of the Hierarchy in the United States (Pius XII – Nov. 1, 1939)

Saeculo Exeunte Octavo – Encyclical Letter of the Supreme Pontiff On the Eighth Centenary of the Independence of Portugal (Pius XII – June 13, 1940)

Mystici Corporis Christi – On The Mystical Body of Christ (Pius XII – 1943)

Divino Afflante Spiritu – On Promoting Biblical Studies, Commemorating the 50th Anniversary of Providentissimus Deus (Pius XII – 1943)

Orientalis Ecclesiae – Encyclical Letter of the Supreme Pontiff on Saint Cyril, Patriarch of Alexandria (Pius XII – Apr. 9, 1944)

Communium Interpretes Dolorum – Encyclical Letter of the Supreme Pontiff Appealing for Prayers for Peace During May (Pius XII – Apr. 15, 1945)

Orientales Omnes Ecclesias – Encyclical Letter of the Supreme Pontiff On the Three Hundred and Fiftieth Anniversary of the Reunion of the Ruthenian Church With the Apostolic See (Pius XII – Dec. 23, 1945)

Quemodmodum – Encyclical Letter of the Supreme Pontiff Pleading for the Care of the World’s Destitute Children (Pius XII – Jan. 6, 1946)

Deiparae Virginis Mariae – Encyclical Letter of the Supreme Pontiff On the Possibility of Defining the Assumption of the Blessed Virgin Mary as a Dogma of Faith (Pius XII – May 1, 1946)

Fulgens Radiatur – Encyclical Letter of the Supreme Pontiff On St. Benedict (Pius XII – Mar. 21, 1947)

Mediator Dei – Encyclical Letter of the Supreme Pontiff On the Sacred Liturgy (Pius XII – Nov. 20, 1947)

Optatissima Pax – Encyclical Letter of the Supreme Pontiff On Prescribing Public Prayers for Social and World Peace (Pius XII – Dec. 18, 1947)

Auspicia Quedam – Encyclical Letter of the Supreme Pontiff On Public Prayers For World Peace and Solution to the Problem of Palestine (Pius XII – May 1, 1948)

In Multiplicibus Curis – Encyclical Letter of the Supreme Pontiff On Prayers For Peace in Palestine (Pius XII – Oct. 24, 1948)

Redemptoris Nostri Cruciatus – Encyclical Letter of the Supreme Pontiff On the Holy Places in Palestine (Pius XII – April 15, 1949)

Anni Sacri – Encyclical Letter of the Supreme Pontiff On a Program For Combatting Atheistic Propaganda Throughout the World (Pius XII – Mar. 12, 1950)

Summi Maeroris – Encyclical Letter of the Supreme Pontiff On Public Prayers for Peace (Pius XII – July 19, 1950)

Humani Generis – Concerning Some False Opinions Threatening To Undermine the Foundations of Catholic Doctrine (Pius XII – 1950)

Mirabile Illud – Encyclical Letter of the Supreme Pontiff On the Crusade of Prayer for Peace (Pius XII – Dec. 6, 1950)

Evangelii Praecones – Encyclical Letter of the Supreme Pontiff On Promotion of Catholic Missions (Pius XII – June 2, 1951)

Sempiternus Rex Christus – Encyclical Letter of the Supreme Pontiff On the Council of Chalcedon (Pius XII – Sept. 8, 1951)

Ingruentium Malorum – Encyclical Letter of the Supreme Pontiff On Reciting the Rosary (Pius XII – Sept. 15, 1951)

Orientales Ecclesias – Encyclical Letter of the Supreme Pontiff On St. Cyril, Patriarch of Alexandria (Pius XII – Dec. 15, 1952)

Doctor Mellifluus – Encyclical Letter of the Supreme Pontiff On St. Bernard of Clairvaux, the Last of the Fathers (Pius XII – May 24, 1953)

Fulgens Corona – Encyclical Letter of the Supreme Pontiff Proclaiming a Marian Year to Commemorate the Centenary of the Definition of the Dogma of the Immaculate Conception (Pius XII – Sept. 8, 1953)

Sacra Virginitas – Encyclical Letter of the Supreme Pontiff On Consecrated Virginity (Pius XII – March 25, 1954)

Ecclesiae Fastos – Encyclical Letter of the Supreme Pontiff On St. Boniface (Pius XII – June 5, 1954)

Ad Sinarum Gentem – Encyclical Letter of the Supreme Pontiff On the Supranationality of the Church (Pius XII – Oct. 7, 1954)

Ad Caeli Reginam – Encyclical Letter of the Supreme Pontiff On Proclaiming the Queenship of Mary (Pius XII – Oct. 11, 1954)

Musicae Sacrae – Encyclical Letter of the Supreme Pontiff On Sacred Music (Pius XII – Dec. 25, 1955)

Haurietis Aquas – Encyclical Letter of the Supreme Pontiff On Devotion to the Sacred Heart (Pius XII – May 15, 1956)

Luctuosissimi Eventus – Encyclical Letter of the Supreme Pontiff Urging Public Prayers For Peace and Freedom for the People of Hungary (Pius XII – Oct. 28, 1956)

Laetamur Admodum – Encyclical Letter of the Supreme Pontiff Renewing Exhortation For Prayers For Peace for Poland, Hungary, and the Middle East (Pius XII – Nov. 1, 1956)

Datis Nuperrime – Encyclical Letter of the Supreme Pontiff Lamenting the Sorrowful Events in Hungary and Condemning the Ruthless Use of Force (Pius XII – Nov. 5, 1956)

Fidei Donum – Encyclical Letter of the Supreme Pontiff On the Present Condition of the Catholic Missions, Especially in Africa (Pius XII – April 21, 1957)

Invictae Athletae – Encyclical Letter of the Supreme Pontiff on St. Andrew Bobola (Pius XII – May 16, 1957)

Le Pelerinage De Lourdes – Encyclical Letter of the Supreme Pontiff Warning Against Materialism on the Centenary of the Apparitions at Lourdes (Pius XII – July 2, 1957)

Miranda Prorsus – Encyclical Letter of the Supreme Pontiff On Motion Pictures, Radio and Television (Pope Pius XII – Sept. 8, 1957)

Meminisse Iuvat – Encyclical Letter of the Supreme Pontiff On Prayer to the Virgin Mary Our Loving Mother For the Persecuted Church (Pius XII – July 14, 1958)