Written by Guide Catholic
Pope Sergius III (119º): Biography, Pontificate & Legacy
Pontificate: 29 January 904 –14 April 911 · Origin: Rome, Estados Papais · Birth name: Sergius Tertius

Sergius III was the 119th pope of the Catholic Church, reigning 29 January 904 –14 April 911 during the early medieval papacy. First pope to be depicted with the papal tiara.
Who Was Pope Sergius III?
Sergius III holds the 119º place among Roman pontiffs, with a recorded reign of 29 January 904 –14 April 911 inside the early medieval papacy. Subject and later the sovereign of the Papal States. What follows is a structured biography — early life, context, acts, and succession — written for Catholics who want Sergius III in context.
Early Life & Background
Before election he was known as Sergius. Born circa 860 Rome, Papal States, he entered a world shaped by politics and piety very different from today's global Church.
Historical Context
Sergius III (#undefined) reigned while Western Roman order fractured, new kingdoms rose, and missionaries carried Christianity across Europe under papal encouragement or correction.
Pontificate & Key Events
The pontificate (29 January 904 –14 April 911) centered on governance during the early medieval papacy. Saeculum obscurum began.
Papal Acts & Achievements
Acts associated with Sergius III (#119, 29 January 904 –14 April 911) still draw historians and Catholics who want more than a one-line summary. His reign remains a link in the succession now counted at 267 popes.
Key Highlights
- 119th pope of the Catholic Church
- Pontificate: 29 January 904 –14 April 911
- First pope to be depicted with the papal tiara.
- Shepherded the Church during the early medieval papacy
- Successor of St. Peter in the official Catholic list
Legacy in the Catholic Church
Sergius III remains pope 119º in the Annuario Pontificio. Set against the early medieval papacy, Sergius III's choices show both the limits of any one pontiff and the continuity of the office he held.
Why Catholics Study This Pope Today
Place Sergius III on your mental map: 119º successor of Peter, reigning 29 January 904 –14 April 911, formed by the early medieval papacy. Start with the concrete record: First pope to be depicted with the papal tiara. Compare Sergius III with the biographies of his predecessor and successor linked below to see reform, rupture, or quiet continuity.
Place in the Line of Succession
Sergius III followed Pope Leo V LEO Quintus (118º, 30 July 903 –December 903) after a transition shaped by the politics and piety of their shared century. He was followed by Pope Anastasius III (120º, 14 April 911 –June 913), 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.