This article contains encyclicals issued by Pope Leo XIII during his twenty-five-year reign as Pope in 1878–1903.Leo XIII, Encyclicals at Vatican.va. Accessed 28 December 2023.Pope Leo XIII Papal Encyclicals Online (includes 1 Bull, 1 Apostolic Letter and 1 Constitution). Accessed 11 October 2011.

No. Title (Latin) Title (English translation) Subject Date1. Inscrutabili Dei consilio By God's Unsearchable Design On the Evils of Society 21 April 18782. Quod apostolici muneris Which Apostolic Duty On Socialism 28 December 18783. Aeterni Patris Of the Eternal Father On the Restoration of Christian Philosophy 4 August 18794. Arcanum divinae The hidden design of the divine wisdom On Christian Marriage 10 February 18805. Grande munus The Great Duty On Saints Cyril and Methodius 30 September 18806. Sancta Dei civitas The Holy City of God On Mission Societies 3 December 18807. Diuturnum Long-lasting On the Origin of Civil Power 29 June 18818. Licet multa Although Many On Catholics in Belgium 3 August 18819. Etsi Nos Even We On Conditions in Italy 15 February 188210. Auspicato concessum A Happy Circumstance On St. Francis of Assisi 17 September 188211. Cum multa With many On Conditions in Spain 8 December 188212. Supremi apostolatus officio The Supreme Apostolic Office On Devotion to the Rosary 1 September 188313. Nobilissima Gallorum gens The Most Noble People of France On the Religious Question in France 8 February 188414. Humanum genus The Human People On Freemasonry 20 April 188415. Superiore anno Last year On the Recitation of the Rosary 30 August 188416. Immortale Dei God's Immortal On the Christian Constitution of States 1 November 188517. Spectata fides Observed Faith On Christian Education 27 November 188518. Quod auctoritate Which by Authority Proclaiming a Jubilee 22 December 188519. Iampridem Long Ago On Catholicism in Germany 6 January 188620. Quod multum Which for Many On the Liberty of the Church 22 August 188621. Pergrata Most Pleasing On the Church in Portugal 14 September 188622. Vi è ben noto It Is Well Known to You On the Rosary and Public Life 20 September 188723. Officio sanctissimo The Holiest Office (or Duty) On the Church in Bavaria 22 December 188724. Quod anniversarius This Anniversiary On His Sacerdotal Jubilee 1 April 188825. In plurimis Among the Many On the Abolition of Slavery (sent to the Bishops of Brazil) 5 May 188826. Libertas Liberty On the Nature of Human Liberty 20 June 188827. Saepe Nos We Often On Boycotting in Ireland 24 June 188828. Paterna Caritas Fatherly Love On Reunion with Rome 25 July 188829. Quam aerumnosa How Troublesome On Italian Immigrants 10 December 188830. Etsi cunctas Although All On the Church in Ireland 21 December 188831. Exeunte iam anno Already at the End of the Year On Right Ordering of Christian Life 25 December 188832. Magni Nobis Great to Us On The Catholic University of America 7 March 188933. Quamquam pluries Although Frequently On Devotion to St. Joseph 15 August 188934. Sapientiae Christianae Of Christian Wisdom On Christians as Citizens 10 January 189035. Dall'alto dell'Apostolico Seggio From the Height of the Apostolic Seat On Freemasonry in Italy 15 October 189036. Catholicae Ecclesiae Of the Catholic Church On Slavery in the Missions 20 November 189037. In ipso In itself On Episcopal Reunions in Austria 3 March 189138. Rerum novarum New Things On Capital and Labour 15 May 189139. Pastoralis vigilantiae Of pastoral (things) On Religious Union 25 June 189140. Pastoralis officii Of the Pastoral Office On the Morality of Duelling 12 September 189141. Octobri mense The Month of October On the Rosary 22 September 189142. Au Milieu Des Sollicitudes Amid the Solicitudes On the Church and State in France 16 February 189243. Quarto abeunte saeculo The Fourth Century Having Past On Christopher Columbus 16 July 189244. Magnae Dei Matris Of the great Mother of God On the Rosary 8 September 189245. Custodi di quella fede Guards of That Faith On Freemasonry 8 December 189246. Inimica vis The Hostile Force On Freemasonry 8 December 189247. Ad extremas To the farthest Seminaries for Native Clergy 24 June 189348. Constanti Hungarorum The Hungarians' Loyal On the Church in Hungary 2 September 189349. Laetitiae sanctae Of holy praise Commending Devotion to the Rosary 8 September 1893 50. Non Mediocri On the Spanish College in Rome 25 October 1893 51. Providentissimus Deus The most provident God On the Study of Holy Scripture 18 November 1893 52. Caritatis Of Love On the Church in Poland 19 March 1894 53. Inter Graves Amdist Grave (Matters) On the Church in Peru 1 May 1894 54. Praeclara gratulationis publicae The Public Rejoicing's Splendid The Reunion of Christendom 20 June 1894 55. Litteras a vobis Your Letter On the Clergy in Brazil 2 July 189456. Iucunda semper expectatione Always with Delightful Expectation On the Rosary 8 September 189457. Orientalium dignitas The dignity of the Easterners On the Churches of the East 30 November 1894 58. Christi nomen The Name of Christ On Propagation of the Faith and Eastern Churches 24 December 189459. Longinqua Extensive On Catholicism in the United States 6 January 189560. Permoti Nos We, Influenced On Social Conditions in Belgium 10 July 189561. Adiutricem Adjutrix On the Rosary 5 September 189562. Insignes Eminent On the Hungarian Millennium 1 May 189663. Satis cognitum Sufficiently Well-Known On the Unity of the Church 29 June 189664. Fidentem piumque animum Confidence and Devotion On the Rosary 20 September 189665. Divinum illud munus That Divine Office On the Holy Spirit 9 May 189766. Militantis Ecclesiae Of the Church Militant On St. Peter Canisius 1 August 189767. Augustissimae Virginis Mariae Of the Most August Virgin Mary On the Confraternity of the Holy Rosary 12 September 189768. Affari vos Speak to You On the Manitoba School Question 8 December 189769. Caritatis studium Of the studies of charity On the Church in Scotland 25 July 189870. Spesse volte Many Times On the Suppression of Catholic Institutions 5 August 189871. Quam religiosa Which Religious On Civil Marriage Law 16 August 189872. Diuturni temporis Long Time On the Rosary 5 September 189873. Quum diuturnum When the Long On the Latin American Bishops' Plenary Council 25 December 189874. Annum sacrum A Holy Year Consecration to the Sacred Heart 25 May 189975. Depuis le jour Since the Day On the Education of the Clergy 8 September 189976. Paternae Fathers On the Education of the Clergy 18 September 189977. Omnibus compertum Everyone Knows On Unity Among the Greek 21 July 190078. Tametsi futura prospicientibus Although the Outlook on the Future On Jesus Christ the Redeemer 1 November 190079. Graves de communi re Grave Regarding General Business On Christian Democracy 18 January 190180. Gravissimas The Gravest On Religious Orders in Portugal 16 May 190181. Reputantibus Reflecting On the Language Question in Bohemia 20 August 190182. Urbanitatis veteris Of Ancient City-Living On the Foundation of a Seminary in Athens 20 November 190183. In amplissimo In The Greatest On the Church in the United States 15 April 190284. Quod votis Which Undertaking On the Proposed Catholic University 30 April 190285. Mirae caritatis Mirror of Charity On the Holy Eucharist 28 May 190286. Quae ad nos Which to Us On the Church in Bohemia and Moravia 22 November 190287. Fin dal principio Since the Beginning On the Education of the Clergy 8 December 190288. Dum multa While with Much Marriage Legislation 24 December 1902

See also Apostolicae curae

References

External links Encyclicals of Pope Leo XIII