Historedia
Person

Pope Leo XIII

Events
9
Episodes
20
Years
1879–1899

Every event in Historedia whose sources name Pope Leo XIII, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

  1. John Henry Newman elevated to cardinal

    1879

    Role: Elevating Pope

    1. 12 May 1879 · Papal StatesConsistory of 12 May 1879

      Pope Leo XIII elevated John Henry Newman to cardinal in a consistory, assigning him the Deaconry of San Giorgio al Velabro.

  2. Vatican Secret Archives opened to scholars under Pope Leo XIII

    1881–1883

    Role: Head of the Catholic Church

    1. 1 January 1881 · VaticanOpening of the Reading Room

      Cardinal Hergenröther's recommendation led to the construction of a reading room for researchers, which opened on 1 January 1881.

    2. April 1883 · VaticanSickel's Research Results

      German historian Theodor von Sickel published results in April 1883 defending the Church against forgery charges, persuading Pope Leo.

    3. August 1883 · VaticanLeo's Endorsement of Historical Research

      In August 1883, Pope Leo wrote to cardinals praising the potential of historical research to clarify the papacy's role.

  3. Pope Leo XIII publishes Supremi apostolatus officio on the Rosary

    1883

    Role: Head of the Catholic Church

    1. 1 September 1883 · Place of issuance not stated in supplied sourcesEncyclical on the Rosary

      Pope Leo XIII issued Supremi apostolatus officio on 1 September 1883, encouraging the practice of the Rosary.

  4. Founding of the Roman Catholic Archdiocese of Madrid

    1885–1892

    Role: Founder

    1. 7 March 1885 · MadridFounding of the Diocese

      Pope Leo XIII founded the Diocese of Madrid y Alcalá de Henares on 7 March 1885, splitting territory from the Archdiocese of Toledo.

    2. 10 June 1886 – 11 July 1892 · MadridSecond Bishop Appointment

      Ciriaco María Sancha y Hervás was appointed as bishop on 10 June 1886, succeeding Narciso Martínez Izquierdo.

  5. The Catholic University of America founded

    1887–1889

    Role: Approving Authority

    1. 1887 · Washington, D.C.Incorporation

      The university was incorporated in 1887 on land next to the Old Soldiers Home.

    2. 10 April 1887 · Washington, D.C.Papal Approval

      Pope Leo XIII sent a letter to Cardinal Gibbons granting permission to establish the university in April 1887.

    3. 24 May 1888 · Washington, D.C.Cornerstone Laying

      President Cleveland attended the laying of the cornerstone for Divinity Hall in May 1888.

    4. 7 March 1889 · Washington, D.C.Charter Issuance

      Pope Leo XIII issued the encyclical Magni Nobis in March 1889, granting the university its charter.

    5. 13 November 1889 · Washington, D.C.University Opening

      The university opened in November 1889 with a curriculum focused on philosophy, literature, and theology.

  6. Pope Leo XIII issues the encyclical Rerum novarum

    1891

    Role: Author of the encyclical

    1. 1891 · Vatican CityResponse to Industrialization

      The encyclical addressed social conflicts arising from capitalism and industrialization.

    2. 1891 · Vatican CityBalance of Rights

      The encyclical balanced worker rights, private property, and state authority, rejecting extremes.

    3. 1891 · Vatican CityNuanced View on Socialism

      Leo offered a nuanced critique of socialism, listing positive and negative aspects.

    4. 15 May 1891 · Vatican CityIssuance of Rerum novarum

      Pope Leo XIII issued the encyclical on 15 May 1891, addressing capital and labor rights.

  7. Pontifical University of Maynooth established by Vatican decree

    1896

    Role: Grantor of Papal Charter

    1. 1896 · Maynooth1896 Pontifical Charter

      Pope Leo XIII granted a pontifical charter in 1896, establishing the Pontifical University at Maynooth to confer degrees.

  8. Karl Lueger becomes mayor of Vienna

    1897

    Role: Intercessor for Lueger's confirmation

    1. 1897 · Vienna1897 Mayoral Confirmation

      After five elections, Pope Leo XIII's intercession led Emperor Franz Joseph to sanction Karl Lueger as Mayor of Vienna in 1897.

  9. Pope Leo XIII consecrates the human race to the Sacred Heart

    1899

    Role: Pope

    1. 25 May 1899 · Vatican CityPublication of Annum Sacrum

      Pope Leo XIII published the encyclical Annum sacrum on 25 May 1899, declaring 1900 a Holy Year and directing the consecration of the human race to the Sacred Heart.

    2. 11 June 1899 · Vatican CityDecree for Consecration

      Following a positive theological investigation, Pope Leo XIII decreed that the consecration of the entire human race to the Sacred Heart should take place on 11 June 1899.

Sources

  1. Pope Leo XIII Wikipedia, revision of 2026-10-04
  2. Archdiocese of Madrid Wikipedia, revision of 2026-06-15
  3. Catholic University of America Wikipedia, revision of 2026-10-04
  4. Rerum novarum Wikipedia, revision of 2026-07-25
  5. St Patrick's Pontifical University, Maynooth Wikipedia, revision of 2026-06-30
  6. Karl Lueger Wikipedia, revision of 2026-10-03
  7. Annum sacrum Wikipedia, revision of 2026-09-10