Encyclicals (Pius XI)

Ubi Arcano Dei Consilio – Encyclical Letter of the Supreme Pontiff On the Peace of Christ in the Kingdom of Christ (Pius XI – Dec. 23, 1922)

Rerum Omnium Perturbationem – Encyclical Letter of the Supreme Pontiff On St. Francis de Sales (Pius XI – Jan. 26, 1923)

Studiorum Ducem – Encyclical Letter of the Supreme Pontiff On St. Thomas Aquinas (Pius XI – June 29, 1923)

Ecclesiam Dei – Encyclical Letter of the Supreme Pontiff On the Occassion of the 300th Anniversary of the Martyrdom of St. Joshaphat, Archbishop of Polotsk (Pius XI – Nov. 12, 1923)

Maximam Gravissimamque – Encyclical Letter of the Supreme Pontiff On French Diocesan Associations (Pius XI – Jan. 18, 1924)

Quas Primas – On The Feast of Christ the King (Pius XI – 1925)

Rerum Ecclesiae – Encyclical Letter of the Supreme Pontiff On Catholic Missions (Pius XI – Feb. 28, 1926)

Rite Expiatis – Encyclical Letter of the Supreme Pontiff On St. Francis of Assisi (Pius XI – April 30, 1926)

Iniquis Afflictisque – Encyclical Letter of the Supreme Pontiff On the Persecution of the Church in Mexico (Pius XI – Nov. 18, 1926)

Mortalium Animos – On Religious Unity (Pope Pius XI – Jan. 6, 1928)

Miserentissimus Redemptor – Encyclical Letter of the Supreme Pontiff On Reparation to the Sacred Heart (Pius XI – May 8, 1928)

Rerum Orientalium – Encyclical Letter of the Supreme Pontiff On the Promotion of Oriental Studies (Pius XI – Sep. 8, 1928)

Mens Nostra – Encyclical Letter of the Supreme Pontiff On the Spiritual Exercises (Pius XI – Dec. 20, 1929)

Quinquagesimo Ante Anno – Encyclical Letter of the Supreme Pontiff On the Occassion of the Closing of the JubileeYear (Pius XI – Dec. 23, 1929)

Divini Illius Magistri – Encyclical Letter of the Supreme Pontiff On Christian Education (Pius XI – Dec. 31, 1929)

Ad Salutem Humani – Encyclical Letter of the Supreme Pontiff On the Occassion of the Fifteenth Centenary of the Death of St. Augustine (Pius XI – April 20, 1930)

Casti Connubii – On Christian Marriage (Pius XI – Dec. 31, 1930)

Quadragesimo Anno – Encyclical Letter of the Supreme Pontiff On Reconstruction of the Social Order (Pius XI – May 15, 1931)

Non Abbiamo Bisogno – Encyclical Letter of the Supreme Pontiff On Persecution of Catholic Action by the Fascists in Italy (Pius XI – June 29, 1931)

Nova Impendet – On The Economic Crisis (Pius XI – Oct. 2, 1931)

Lux Veritatis – Encyclical Letter of the Supreme Pontiff On the Council of Ephesus and On the Publishing of an Office and Mass of the Divine Maternity (Pius XI – Dec. 25, 1931)

Caritate Christi Compulsi – On The Sacred Heart of Christ (Pius XI – May 3, 1932)

Acerba Animi – Encyclical Letter of the Supreme Pontiff On Persecution of the Church in Mexico (Pius XI – Sep. 29, 1932)

Dilectissima Nobis – Encyclical Letter of the Supreme Pontiff On Oppression of the Church in Spain (Pius XI – June 3, 1933)

Ad Catholici Sacerdotii – Encyclical Letter of the Supreme Pontiff On the Catholic Priesthood (Pius XI – Dec. 20, 1935)

Vigilante Cura – Encyclical Letter of the Supreme Pontiff On the Motion Picture (Pius XI – June 29, 1936)

Mit Brennender Sorge – Encyclical Letter of the Supreme Pontiff On the Church and the German Reich (Pius XI – Mar. 14, 1937)

Divini Redemptoris – On Atheistic Communism (Pius XI – Mar. 19, 1937)

Firmissimam Constantiam – Encyclical Letter of the Supreme Pontiff On the Religious Situation in Mexico (Pius XI – Mar. 28, 1937)

Ingravescentibus Malis – Encyclical Letter of the Supreme Pontiff On the Rosary (Pius XI – Sep. 29, 1937)