Encyclical Letters (Leo XIII)

Inscrutabili Dei Consilio – Encyclical Letter of the Supreme Pontiff On the Evils Affecting Modern Society, Their Causes and Remedies (Leo XIII – Apr. 21, 1878)

Supremi Apostolatus – Encyclical Letter of the Supreme Pontiff Ordering the Month of October Be Dedicated With Devotion to Our Lady of the Rosary (Leo XIII – Sept. 1, 1883)

Nobilissima Gallorum Gens – Encyclical letter of the Supreme Pontiff On The Religious Question in France (Leo XIII – Feb. 8, 1884)

Humanum Genus – Encyclical Letter of the Supreme Pontiff on Freemasonry (Leo XIII – Apr. 20, 1884)

Superiore Anno – Encyclical Letter of the Supreme Pontiff Renewing His Orders For the Devoted Honoring of the Blessed Mother of God in the Month of October (Leo XIII – Aug. 30, 1884)

Immortale Dei – Encyclical Letter of the Supreme Pontiff on the Christian Constitution of States (Leo XIII – Nov. 1, 1885)

Spectata Fides – Encyclical Letter of the Supreme Pontiff On Christian Education in Great Britain (Leo XIII – Nov. 27, 1885)

Quod Auctoritate – Encyclical Letter of the Supreme Pontiff Proclaiming an Extraordinary Jubilee (Leo XIII – Dec. 22, 1885)

Iampridem – Encyclical Letter of the Supreme Pontiff on Catholicism in Germany (Leo XIII – Jan. 6, 1886)

Quod Multum – Encyclical Letter of the Supreme Pontiff Ordering the Strengthening of the Church in Hungary (Leo XIII – Aug. 22, 1886)

Peregrata – Encyclical Letter of the Supreme Pontiff On the Church in Portugal (Leo XIII – Sep. 14, 1886)

Vi e Ben Noto – Encyclical Letter of the Supreme Pontiff to the Bishops of Italy On the Rosary and Public Life (Leo XIII – Sep. 20, 1887)

Officio Sanctissimo – Encyclical Letter of the Supreme Pontiff On the Church in Bavaria (Leo XIII – Dec. 22, 1887)

Quod Anniversarius – Encyclical Letter of the Supreme Pontiff Decreeing a Special Mass For the Dead on the Occassion of His Sacerdotal Jubilee (Leo XIII – Easter, 1888)

In Plurimis – Encyclical Letter of the Supreme Pontiff On the Abolition of Slavery in Brazil (Leo XIII – May 5, 1888)

Libertas – Encyclical Letter of the Supreme Pontiff On the Nature of Liberty (Leo XIII – June 20, 1888)

Saepe Nos – Encyclical Letter of the Supreme Pontiff On Boycotting in Ireland (Leo XIII – June 24, 1888)

Paterna Caritas – Encyclical Letter of the Supreme Pontiff to the Church in Armenia On Reunion With Rome (Leo XIII – July 25, 1888)

Quam Aerumnosa – Encyclical Letter of the Supreme Pontiff On Italian Immigrants to America (Leo XIII – Dec. 10, 1888)

Etsi Cunctas – Encyclical Letter of the Supreme Pontiff On the Church in Ireland (Leo XIII – Dec. 21, 1888)

Exeunte Iam Anno – Encyclical Letter of the Supreme Pontiff On the Right Ordering of Christian Life (Leo XIII – Dec. 25, 1888)

Magni Nobis – Encyclical Letter of the Supreme Pontiff Establishing the Catholic University of America in Washington (Leo XIII – Mar. 7, 1889)

Quamquam Pluries – Encyclical Letter of the Supreme Pontiff On Devotion to St. Joseph (Leo XIII – Aug. 15, 1889)

Sapientiae Christianae – Encyclical Letter of the Supreme Pontiff On the Chief Duties of Christians as Citizens (Leo XIII – Jan. 10, 1890)

Dall ‘Alto Dell ‘Apostolico Seggio – Encyclical Letter of the Supreme Pontiff On Conquering Freemasonry in Italy (Leo XIII – Oct. 15, 1890)

Catholicae Ecclesiae – Encyclical Letter of the Supreme Pontiff On Eradicating Slavery in Africa (Leo XIII – Nov. 20, 1890)

In Ipso – Encyclical Letter of the Supreme Pontiff On Annual Bishop’s Conferences in Austria (Leo XIII – March 3, 1891)

Rerum Novarum – Encyclical Letter of the Supreme Pontiff On the Condition of the Working Classes (Leo XIII – May 15, 1891)

Pastoralis Vigilantiae – Encyclical Letter of the Supreme Pontiff On Religious Union in Portugal (Leo XIII – June 25, 1891)

Pastoralis Officii – Encyclical Letter of the Supreme Pontiff On the Morality of Dueling (Leo XIII – Sept. 12, 1891)

Octobri Mense – Encyclical Letter of the Supreme Pontiff On the Rosary (Leo XIII – Sept. 22, 1891)

Au Milieu Des Sollicitudes – Encyclical of the Supreme Pontiff to the Church in France on the Obedience Due to the Civil Power (Leo XIII – Feb. 16, 1892)

Quarto Abuente Saeculo – Encyclical Letter of the Supreme Pontiff On The Columbus Quadricentennial (Leo XIII – July 16, 1892)

Magne Dei Matris – Encyclical Letter of the Supreme Pontiff On the Rosary (Leo XIII – Sept. 8, 1892)

Inimica Vis – Encyclical Letter of the Supreme Pontiff On Freemasonry in Italy (Leo XIII – Dec. 8, 1892)

Custodi Di Quella Fede – Encyclical Letter of the Supreme Pontiff On the Effects of and the Fight Against Masonry in Italy (Leo XIII – Oct. 8, 1892)

Ad Extremas – Encyclical Letter of the Supreme Pontiff On Seminaries for Native Clergy in the Far East (Leo XIII – June 24, 1893)

Constanti Hungarorum – Encyclical Letter of the Supreme Pontiff On Fighting Against the Attack on the Church in Hungary (Leo XIII – Sept. 2, 1893)

Laetitiae Sanctae – Encyclical Letter of the Supreme Pontiff On the Effect of Praying the Rosary on Society (Leo XIII – Sept. 8, 1893)

Non Mediocri – Encyclical Letter of the Supreme Pontiff On the Foundation of a Roman College For Spanish Clerics (Leo XIII – Oct. 25, 1893)

Providentissimus Deus – Encyclical Letter of the Supreme Pontiff On the Study of Holy Scripture (Leo XIII – Nov. 18, 1893)

Caritatis – Encyclical Letter of the Supreme Pontiff On the Church in Poland (Leo XIII – Mar. 19, 1894)

Inter Graves – Encyclical Letter of the Supreme Pontiff On Episcopal Synods in Peru (Leo XIII – May 1, 1894)

Litteras a Vobis – Encyclical Letter of the Supreme Pontiff On Building Up the Native Clergy in Brazil (Leo XIII – July 2, 1894)

Iucunda Semper Expectatione – Encyclical Letter of the Supreme Pontiff On Seeking Aid Through the Intercession of the Mother of God By Means of the Rosary (Leo XIII – Sept. 8, 1894)

Christi Nomen – Encyclical Letter of the Supreme Pontiff Directing Contributions to the Society for the Propagation of the Faith on Behalf of the Eastern Churches (Leo XIII – Dec. 24, 1894)

Longinqua – Encyclical Letter of the Supreme Pontiff On Catholicism in America (Leo XIII – Jan. 6, 1895)

Permoti Nos – Encyclical Letter of the Supreme Pontiff Ordering Concord in Addressing the Social Question in Belgium (Leo XIII – July 10, 1895)

Adiutricem – Encyclical Letter of the Supreme Pontiff On the Power and the Use of the Rosary to Reconcile Separated Nations to the Church (Leo XIII – Sept. 5, 1895)

Insignes – Encyclical Letter of the Supreme Pontiff On the Benefits of the Catholic Religion to the State on the Occassion of the Hungarian Millennium (Leo XIII – May 1, 1896)

Satis Cognitum – Encyclical Letter of the Supreme Pontiff On The Unity of the Church (Leo XIII – June 29, 1896)

Fidentem Piumque Animum – Encyclical Letter of the Supreme Pontiff Insisting Upon and Confirming the Pleasant and Advantageous Effects of the Proper Employment of the Rosary (Leo XIII – Sept. 20, 1896)

Divinum Illud Munus – Encyclical Letter of the Supreme Pontiff On the Holy Spirit (Leo XIII – May 9, 1897)

Militantis Ecclesiae – Encyclical Letter of the Supreme Pontiff On St. Peter Canisius and On Education in Austria, Germany, and Switzerland (Leo XIII – Aug 1, 1897)

Augustissimae Virginis Mariae – Encyclical Letter of the Supreme Pontiff On the Confraternity of the Holy Rosary (Leo XIII – Sept. 12, 1897)

Affari Vos – Encyclical Letter of the Supreme Pontiff On the Manitoba School Question (Leo XIII – Dec. 18, 1897)

Caritatis Studium – Encyclical Letter of the Supreme Pontiff On Reclaiming the Separated Brethren for the Church in Scotland (Leo XIII – July 25, 1898)

Spesse Volte – Encyclical Letter of the Supreme Pontiff On the History and Recent Suppression of Catholic Charitable Institutions in Italy (Leo XIII – Aug. 5, 1898)

Quam Religiosa – Encyclical Letter of the Supreme Pontiff On the Disobediently Disseminated Law in Peru Introducing Civil Marriage (Leo XIII – Aug. 16, 1898)

Diuturni Temporis – Encyclical Letter of the Supreme Pontiff Announcing a Projected Constitution Concerning the Privileges and Favors Enjoyed By the Members of the Rosary Sodality (Leo XIII – Sept. 5, 1898)

Quum Diuturnum – Encyclical Letter of the Supreme Pontiff Announcing the Latin American Bishops’ Plenary Council (Leo XIII – Dec. 25, 1898)

Annum Sacrum – Encyclical Letter of the Supreme Pontiff Ordaining Certain Prayers and the Consecration to the Sacred Heart of Jesus (Leo XIII – May 25, 1899)

Depuis Le Jour – Encyclical Letter of the Supreme Pontiff On the Education and Ministry of the Clergy in France (Leo XIII – Sept. 8, 1899)

Paternae – Encyclical Letter of the Supreme Pontiff On the Education of Clergy in Brazil (Leo XIII – Sept. 18, 1899)

Omnibus Compertum – Encyclical Letter of the Supreme Pontiff Consolidating the Agreement Among the Greek Melchites (Leo XIII – July 21, 1900)

Tametsi Futura Prospicientibus – Encyclical Letter of the Supreme Pontiff On Jesus Christ the Redeemer (Leo XIII – Nov. 1, 1900)

Graves De Communi Re – Encyclical Letter of the Supreme Pontiff On Christian Democracy (Leo XIII – Jan. 18, 1901)

Gravissimas – Encyclical Letter of the Supreme Pontiff to the Bishops of Portugal On Dealing With the Recent Decrees Against Religious Societies (Leo XIII – May 16, 1901)

Reputantibus – Encyclical Letter of the Supreme Pontiff On the Language Question in Bohemia (Leo XIII – Aug. 20, 1901)

Urbanitatis Veteris – Encyclical Letter of the Supreme Pontiff On the Foundation of a Seminary in Athens (Leo XIII – Nov. 20, 1901)

In Amplissimo – Encyclical Letter of the Supreme Pontiff Praising the Action of the Bishops of the United States of North America in Advancing the Catholic Religion in Spite of Being Shown No Special Favor By the Law of the Land (Leo XIII – Apr. 15, 1902)

Quod Votis – Encyclical Letter of the Supreme Pontiff On the Proposed Catholic University in Austria (Leo XIII – Apr. 30, 1902)

Mirae Caritatis – Encyclical Letter of the Supreme Pontiff On the Holy Eucharist (Leo XIII – May 28, 1902)

Quae Ad Nos – Encyclical Letter of the Supreme Pontiff On the Departure of Large Numbers From the Rites and Practices of Catholicism in Bohemia and Moravia (Leo XIII – Nov. 22, 1902)

Fin Dal Principio – Encyclical Letter of the Supreme Pontiff to the Bishops of Italy On the Education of the Clergy (Leo XIII – Dec. 8, 1902)

Dum Multa – Encyclical Letter of the Supreme Pontiff Condemning the So-Called Civil Marriage Laws Recently Enacted in Ecuador (Leo XIII – Dec. 24, 1902)