Written by Guide Catholic
Pope Leo XIII (256º): Rerum Novarum, Social Teaching & Modern Papacy
Pontificate: 20 February 1878–20 July 1903 · Origin: Carpineto Romano, Império Francês · Birth name: Leo Decimus Tertius
Leo XIII LEO Tertius Decimus was the 256th pope of the Catholic Church, reigning 20 February 1878–20 July 1903 during the modern papacy. First pope to be filmed using a motion picture camera(1898) and first pope with voice recorded.
Who Was Pope Leo XIII LEO Tertius Decimus?
Among the 267 popes, Leo XIII LEO Tertius Decimus is number 256, remembered for the years 20 February 1878–20 July 1903 in the modern papacy. Search interest often clusters around Rerum Novarum. French citizen of Italian ethnicity, later becoming a subject of the Papal States and finally an Italian citizen. Use the sections below to move from a one-line summary of Leo XIII LEO Tertius Decimus to a usable historical and spiritual picture.
Early Life & Background
Before election he was known as Gioacchino Vincenzo Raffaele Luigi Pecci. Born 2 March 1810 Carpineto Romano, French Empire, he entered a world shaped by politics and piety very different from today's global Church.
Historical Context
Leo XIII LEO Tertius Decimus (#undefined) served while industry, world wars, the loss of the Papal States, and Vatican councils remade how Rome speaks to a mass society.
Pontificate & Key Events
The pontificate (20 February 1878–20 July 1903) centered on governance during the modern papacy. Issued the encyclical Rerum novarum(1891), supporting Christian democracy against Communism. Approved two new Marian scapulars; first pope to fully embrace the concept of Mary as mediatrix.
Papal Acts & Achievements
Acts associated with Leo XIII LEO Tertius Decimus (#256, 20 February 1878–20 July 1903) still draw historians and Catholics who want more than a one-line summary. Fourth-longest reigning pope after Peter, Pius IX, and John Paul II. Promoted the rosary and scapular. Oldest verified pope in office.
Key Highlights
- 256th pope of the Catholic Church
- Pontificate: 20 February 1878–20 July 1903
- Issued the encyclical Rerum novarum(1891), supporting Christian democracy against Communism.
- Approved two new Marian scapulars; first pope to fully embrace the concept of Mary as mediatrix.
- First pope to be filmed using a motion picture camera(1898) and first pope with voice recorded.
Legacy in the Catholic Church
Leo XIII LEO Tertius Decimus remains pope 256º in the Annuario Pontificio. Set against the modern papacy, Leo XIII LEO Tertius Decimus's choices show both the limits of any one pontiff and the continuity of the office he held.
Why Catholics Study This Pope Today
Catholics who open a page on Leo XIII LEO Tertius Decimus usually want more than a birth-death line — they want to know what #256 did inside the modern papacy. Start with the concrete record: Issued the encyclical Rerum novarum(1891), supporting Christian democracy against Communism. Approved two new Marian scapulars; first pope to fully embrace the concept of Mary as mediatrix. Where bulls, conciliar acts, or encyclicals survive from this reign, they repay readers who want primary sources rather than summaries alone. Compare Leo XIII LEO Tertius Decimus with the biographies of his predecessor and successor linked below to see reform, rupture, or quiet continuity.
Place in the Line of Succession
Leo XIII LEO Tertius Decimus followed Pope Bl. Pius IX (255º, 16 June 1846–7 February 1878) after a transition shaped by the politics and piety of their shared century. He was followed by Pope St. Pius X (257º, 4 August 1903–20 August 1914), whose biography continues the chain on Guide Catholic. For the full chronological map, see our complete list of all 267 popes — then read neighboring biographies for contrast, not only continuity.