List of encyclicals of Pope Leo XIII

This article contains encyclicals issued by Pope Leo XIII during his twenty-five-year reign as Pope in 1878–1903.^[1][2]

No.	Title (Latin)	Title (English translation)	Subject	Date
1.	Inscrutabili Dei consilio	By God's Unsearchable Design	On the Evils of Society	21 April 1878
2.	Quod apostolici muneris	Which Apostolic Duty	On Socialism	28 December 1878
3.	Aeterni Patris	Of the Eternal Father	On the Restoration of Christian Philosophy	4 August 1879
4.	Arcanum divinae	The hidden design of the divine wisdom	On Christian Marriage	10 February 1880
5.	Grande munus	The Great Duty	On Saints Cyril and Methodius	30 September 1880
6.	Sancta Dei civitas	The Holy City of God	On Mission Societies	3 December 1880
7.	Diuturnum	Long-lasting	On the Origin of Civil Power	29 June 1881
8.	Licet multa	Although Many	On Catholics in Belgium	3 August 1881
9.	Etsi Nos	Even We	On Conditions in Italy	15 February 1882
10.	Auspicato concessum	A Happy Circumstance	On St. Francis of Assisi	17 September 1882
11.	Cum multa	With many	On Conditions in Spain	8 December 1882
12.	Supremi apostolatus officio	The Supreme Apostolic Office	On Devotion to the Rosary	1 September 1883
13.	Nobilissima Gallorum gens	The Most Noble People of France	On the Religious Question in France	8 February 1884
14.	Humanum genus	The Human People	On Freemasonry	20 April 1884
15.	Superiore anno	Last year	On the Recitation of the Rosary	30 August 1884
16.	Immortale Dei	God's Immortal	On the Christian Constitution of States	1 November 1885
17.	Spectata fides	Observed Faith	On Christian Education	27 November 1885
18.	Quod auctoritate	Which by Authority	Proclaiming a Jubilee	22 December 1885
19.	Iampridem	Long Ago	On Catholicism in Germany	6 January 1886
20.	Quod multum	Which for Many	On the Liberty of the Church	22 August 1886
21.	Pergrata	Most Pleasing	On the Church in Portugal	14 September 1886
22.	Vi è ben noto	It Is Well Known to You	On the Rosary and Public Life	20 September 1887
23.	Officio sanctissimo	The Holiest Office (or Duty)	On the Church in Bavaria	22 December 1887
24.	Quod anniversarius	This Anniversiary	On His Sacerdotal Jubilee	1 April 1888
25.	In plurimis	Among the Many	On the Abolition of Slavery (sent to the Bishops of Brazil)	5 May 1888
26.	Libertas	Liberty	On the Nature of Human Liberty	20 June 1888
27.	Saepe Nos	We Often	On Boycotting in Ireland	24 June 1888
28.	Paterna Caritas	Fatherly Love	On Reunion with Rome	25 July 1888
29.	Quam aerumnosa	How Troublesome	On Italian Immigrants	10 December 1888
30.	Etsi cunctas	Although All	On the Church in Ireland	21 December 1888
31.	Exeunte iam anno	Already at the End of the Year	On Right Ordering of Christian Life	25 December 1888
32.	Magni Nobis	Great to Us	On The Catholic University of America	7 March 1889
33.	Quamquam pluries	Although Frequently	On Devotion to St. Joseph	15 August 1889
34.	Sapientiae Christianae	Of Christian Wisdom	On Christians as Citizens	10 January 1890
35.	Dall'alto dell'Apostolico Seggio	From the Height of the Apostolic Seat	On Freemasonry in Italy	15 October 1890
36.	Catholicae Ecclesiae	Of the Catholic Church	On Slavery in the Missions	20 November 1890
37.	In ipso	In itself	On Episcopal Reunions in Austria	3 March 1891
38.	Rerum novarum	New Things	On Capital and Labour	15 May 1891
39.	Pastoralis vigilantiae	Of pastoral (things)	On Religious Union	25 June 1891
40.	Pastoralis officii	Of the Pastoral Office	On the Morality of Duelling	12 September 1891
41.	Octobri mense	The Month of October	On the Rosary	22 September 1891
42.	Au Milieu Des Sollicitudes	Amid the Solicitudes	On the Church and State in France	16 February 1892
43.	Quarto abeunte saeculo	The Fourth Century Having Past	On Christopher Columbus	16 July 1892
44.	Magnae Dei Matris	Of the great Mother of God	On the Rosary	8 September 1892
45.	Custodi di quella fede	Guards of That Faith	On Freemasonry	8 December 1892
46.	Inimica vis	The Hostile Force	On Freemasonry	8 December 1892
47.	Ad extremas	To the farthest	Seminaries for Native Clergy	24 June 1893
48.	Constanti Hungarorum	The Hungarians' Loyal	On the Church in Hungary	2 September 1893
49.	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		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 1894
56.	Iucunda semper expectatione	Always with Delightful Expectation	On the Rosary	8 September 1894
57.	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 1894
59.	Longinqua	Extensive	On Catholicism in the United States	6 January 1895
60.	Permoti Nos	We, Influenced	On Social Conditions in Belgium	10 July 1895
61.	Adiutricem	Adjutrix	On the Rosary	5 September 1895
62.	Insignes	Eminent	On the Hungarian Millennium	1 May 1896
63.	Satis cognitum	Sufficiently Well-Known	On the Unity of the Church	29 June 1896
64.	Fidentem piumque animum	Confidence and Devotion	On the Rosary	20 September 1896
65.	Divinum illud munus	That Divine Office	On the Holy Spirit	9 May 1897
66.	Militantis Ecclesiae	Of the Church Militant	On St. Peter Canisius	1 August 1897
67.	Augustissimae Virginis Mariae	Of the Most August Virgin Mary	On the Confraternity of the Holy Rosary	12 September 1897
68.	Affari vos	Speak to You	On the Manitoba School Question	8 December 1897
69.	Caritatis studium	Of the studies of charity	On the Church in Scotland	25 July 1898
70.	Spesse volte	Many Times	On the Suppression of Catholic Institutions	5 August 1898
71.	Quam religiosa	Which Religious	On Civil Marriage Law	16 August 1898
72.	Diuturni temporis	Long Time	On the Rosary	5 September 1898
73.	Quum diuturnum	When the Long	On the Latin American Bishops' Plenary Council	25 December 1898
74.	Annum sacrum	A Holy Year	Consecration to the Sacred Heart	25 May 1899
75.	Depuis le jour	Since the Day	On the Education of the Clergy	8 September 1899
76.	Paternae	Fathers	On the Education of the Clergy	18 September 1899
77.	Omnibus compertum	Everyone Knows	On Unity Among the Greek	21 July 1900
78.	Tametsi futura prospicientibus	Although the Outlook on the Future	On Jesus Christ the Redeemer	1 November 1900
79.	Graves de communi re	Grave Regarding General Business	On Christian Democracy	18 January 1901
80.	Gravissimas	The Gravest	On Religious Orders in Portugal	16 May 1901
81.	Reputantibus	Reflecting	On the Language Question in Bohemia	20 August 1901
82.	Urbanitatis veteris	Of Ancient City-Living	On the Foundation of a Seminary in Athens	20 November 1901
83.	In amplissimo	In The Greatest	On the Church in the United States	15 April 1902
84.	Quod votis	Which Undertaking	On the Proposed Catholic University	30 April 1902
85.	Mirae caritatis	Mirror of Charity	On the Holy Eucharist	28 May 1902
86.	Quae ad nos	Which to Us	On the Church in Bohemia and Moravia	22 November 1902
87.	Fin dal principio	Since the Beginning	On the Education of the Clergy	8 December 1902
88.	Dum multa	While with Much	Marriage Legislation	24 December 1902

See also

• Apostolicae curae