Written by Guide Catholic
Pope John XVII (140º): Biography, Pontificate & Legacy
Pontificate: 16 May 1003 –6 November 1003 · Origin: Rome, Estados Papais · Birth name: Ioannes Decimus Septimus
John XVII was the 140th pope of the Catholic Church, reigning 16 May 1003 –6 November 1003 during the early medieval papacy. Subject and later the sovereign of the Papal States.
Who Was Pope John XVII?
Among the 267 popes, John XVII is number 140, remembered for the years 16 May 1003 –6 November 1003 in the early medieval papacy. Subject and later the sovereign of the Papal States. Use the sections below to move from a one-line summary of John XVII to a usable historical and spiritual picture.
Early Life & Background
Before election he was known as Giovanni Sicco. Born circa 955 Rome, Papal States, he entered a world shaped by politics and piety very different from today's global Church.
Historical Context
John XVII (#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 (16 May 1003 –6 November 1003) centered on governance during the early medieval papacy.
Papal Acts & Achievements
Acts associated with John XVII (#140, 16 May 1003 –6 November 1003) 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
- 140th pope of the Catholic Church
- Pontificate: 16 May 1003 –6 November 1003
- Shepherded the Church during the early medieval papacy
- Successor of St. Peter in the official Catholic list
Legacy in the Catholic Church
John XVII remains pope 140º in the Annuario Pontificio. Set against the early medieval papacy, John XVII's choices show both the limits of any one pontiff and the continuity of the office he held.
Why Catholics Study This Pope Today
Reading John XVII as pope 140º (16 May 1003 –6 November 1003) is a way to study how Rome answered the crises of the early medieval papacy. Begin with this documented note: Subject and later the sovereign of the Papal States. Use the neighboring pontiff links below to test whether John XVII's reign looks unique or typical for the early medieval papacy.
Place in the Line of Succession
John XVII followed Pope Sylvester II (139º, 2 April 999 –12 May 1003) after a transition shaped by the politics and piety of their shared century. He was followed by Pope John (141º, 25 December 1003 –18 July 1009), 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.