Ensiklik Paus LEO XIII
20 Februari 1878 ~ 20 Juli 1903  

Ensiklik

• Ad Extremas (Seminaries for Native Clergy) June 24, 1893
• Adiutricem (On the Rosary) September 5, 1895
• Aeterni Patris (On the Restoration of Christian Philosophy) August 4, 1879
• Affari Vos (On the Manitoba School Question) December 8, 1897
• Annum Sacrum (Consecration to the Sacred Heart) May 25, 1899
• Apostolicae Curae (On the Nullity of Anglican Orders) September 15, 1896 [Bull]
• Arcanum (On Christian Marriage) February 10, 1880
• Au Milieu Des Sollicitudes (On the Church and State in France) February 16, 1892
• Augustissimae Virginis Mariae (On the Confraternity of the Holy Rosary) September 12, 1897
• Auspicato Concessum (On St. Francis of Assisi) September 17, 1882
• Caritatis Studium (On the Church in Scotland) July 25, 1898
• Catholicae Ecclesiae (On Slavery in the Missions) November 20, 1890
• Christi Nomen (On Propogation of the Faith and Eastern Churches) December 24, 1894
• Constanti Hungarorum (On the Church in Hungary) September 2, 1893
• Cum Multa (On Conditions in Spain) December 8, 1882
• Custodi Di Quella Fede (On Freemasonry) December 8, 1892
• Dall'alto Dell'apostolico Seggio (On Freemasonry in Italy) October 15, 1890
• Depuis Le Jour (On the Education of the Clergy) September 8, 1899
• Diuturni Temporis (On the Rosary) September 5, 1898
• Diuturnum (On the Origin of Civil Power) June 29, 1881
• Divinum Illud Munus (On the Holy Spirit Divinum) May 9, 1897
• Dum Multa (Marriage Legislation) December 24, 1902
• Etsi Cunctas (On the Church in Ireland) December 21, 1888
• Etsi Nos (On Conditions in Italy) February 15, 1882
• Exeunte Iam Anno (On Right Ordering of Christian Life) December 25, 1888
• Fidentem Piumque Animum (On the Rosary) September 20, 1896
• Fin Dal Principio (On the Education of the Clergy) December 8, 1902
• Grande Munus (On Saints Cyril and Methodius) September 30, 1880
• Graves De Communi Re (On Christian Democracy) January 18, 1901
• Gravissimas (On Religious Orders in Portugal) May 16, 1901
• Humanum Genus (On Freemasonry) April 20, 1884
• Iampridem (On Catholicism in Germany) January 6, 1886
• Immortale Dei (On the Christian Constitution of States) November 1, 1885
• In Amplissimo (On the Church in the United States) April 15, 1902
• In Ipso (On Episcopal Reunions in Austria) March 3, 1891
• In Plurimis (On the Abolition of Slavery) May 5, 1888
• Inimica Vis (On Freemasonry) December 8, 1892
• Inscrutabili Dei Consilio (On the Evils of Society) April 21, 1878
• Insignes (On the Hungarian Millenium) May 1, 1896
• Iucunda Semper Expectatione (On the Rosary) September 8, 1894
• Laetitiae Sanctae (Commending Devotion to the Rosary) September 8, 1893
• Libertas Praestantissimum(On the Nature of Human Liberty) June 20, 1888
• Licet Multa (On Catholics in Belgium) August 3, 1881
• Litteras A Vobis (On the Clergy in Brasil) July 2, 1894
• Longinqua (On Catholicism in the United States) January 6, 1895
• Magnae Dei Matris (On the Rosary) September 8, 1892
• Magni Nobis (On the Catholic University of America) March 7, 1889
• Militantis Ecclesiae (On St. Peter Canisius) August 1, 1897
• Mirae Caritatis (On the Holy Eucharist) May 28, 1902
• Misericors Dei Filius: (Constitution On the Law of the Franciscan third Order secular) May 30, 1883 A. D. English / Latin
• Nobilissima Gallorum Gens (On the Religious Question in France) February 8, 1884
• Octobri Mense (On the Rosary) September 22, 1891
• Officio Sanctissimo (On the Church in Bavaria) December 22, 1887
• Omnibus Compertum (On Unity Among the Greek) July 21, 1900
• Orientalium Dignitas (On the Churches of the East) November 30, 1894
• Pastoralis Officii (On the Morality of Dueling) September 12, 1891
• Pastoralis (On Religious Union) June 25, 1891
• Paternae (On the Education of the Clergy) September 18, 1899
• Pergrata (On the Church in Portugal) September 14, 1886
• Permoti Nos (On Social Conditions in Belgium) July 10, 1895
• Praeclara Gratulationis Publicae (The Reunion of Christendom) June 20, 1894 [External source]
• Providentissimus Deus (On the Study of Holy Scripture) November 18, 1893
• Quae Ad Nos (On the Church in Bohemia and Moravia) November 22, 1902
• Quam Aerumnosa (On Italian Immigrants) December 10, 1888
• Quam Religiosa (On Civil Marriage Law) August 16, 1898
• Quamquam Pluries (On Devotion to St. Joseph) August 15, 1889
• Quarto Abeunte Saeculo (On Christopher Columbus) July 16, 1892
• Quod Anniversarius (On His Sacerdotal Jubilee) April 1, 1888
• Quod Apostolici Muneris (On Socialism) December 28, 1878
• Quod Auctoritate (Proclaiming a Jubilee) December 22, 1885
• Quod Multum (On the Liberty of the Church) August 22, 1886
• Quod Votis (On the Proposed Catholic University) April 30, 1902
• Quum Diuturnum (On the Latin American Bishops' Plenary Council) December 25, 1898
• Reputantiubus (On the Language Question in Bohemia) August 20, 1901
• Rerum Novarum (On Capitol and Labor) May 15, 1891
• Saepe Nos (On Boycotting in Ireland) June 24, 1888
• Sancta Dei Civitas (On Mission Societies) December 3, 1880
• Sapientiae Christianae (On Christians as Citizens) January 10, 1890
• Satis Cognitum (On the Unity of the Church) June 29, 1896
• Spectata Fides (On Christian Education) November 27, 1885
• Spesse Volte (On the Suppression of Catholic Institutions) August 5, 1898
• Superiore Anno (On the Recitation of the Rosary) August 30, 1884
• Supremi Apostolatus Officio (On Devotion to the Rosary) September 1, 1883
• Tametsi Futura Prospicientibus (On Jesus Christ the Redeemer) November 1, 1900
• Testem Benevolentiae Nostrae (Virtue, Nature and Grace, and Americanism) January 22, 1899
• Urbanitatis Veteris (On the Foundation of a Seminary in Athens) November 20, 1901
• Vi E Ben Noto (On the Rosary and Public Life) September 20, 1887