Pope Gregory VI (148º): Biography, Pontificate & Legacy
Pontificate: 1 May 1045 –20 December 1046
Gregory VI was the 148th pope of the Catholic Church, reigning 1 May 1045 –20 December 1046 during the early medieval papacy. Subject and later the sovereign of the Papal States.
Who Was Pope Gregory VI?
This biography of Gregory VI (148º) covers background, major events, and legacy in the line of St. Peter. During the early medieval papacy, the Bishop of Rome exercised teaching, sanctifying, and governing authority for the universal Church.
Early Life & Background
Before election he was known as Giovanni Graziano Pierleoni. Born circa 1000 Rome, Papal States, he entered a world shaped by politics and piety very different from today's global Church.
Historical Context
Gregory VI reigned during the early Middle Ages, when the papacy navigated the collapse of Roman order in the West, the rise of new kingdoms, and the missionary expansion of Christianity across Europe. Deposed at the Council of Sutri.
Pontificate & Key Events
The pontificate (1 May 1045 –20 December 1046) centered on governance during the early medieval papacy.
Papal Acts & Achievements
Gregory VI left a distinct mark through decisions that historians still debate and Catholics still study. His reign contributed to the continuous apostolic succession now numbering 267 popes.
Key Highlights
- 148th pope of the Catholic Church
- Pontificate: 1 May 1045 –20 December 1046
- Deposed at the Council of Sutri.
- Shepherded the Church during the early medieval papacy
- Successor of St. Peter in the official Catholic list
Legacy in the Catholic Church
Gregory VI remains pope 148º in the Annuario Pontificio. Read against the early medieval papacy, his pontificate shows how Providence works through imperfect ministers without abandoning the Barque of Peter.
Why Catholics Study This Pope Today
Studying Gregory VI helps Catholics see how the Holy Spirit guided the Church through the early medieval papacy — with human weakness and grace intertwined. Primary sources from this pontificate — bulls, conciliar acts, or encyclicals — reward readers who want depth beyond summaries. Place this pope in context using our chronological list of all 267 popes and the biographies of his immediate predecessor and successor linked below.
Place in the Line of Succession
Gregory VI followed Pope Benedict IX (147º) in the unbroken line of apostolic succession from St. Peter. Upon his death or resignation, he was succeeded by Pope Clement II (149º), who continued the mission of shepherding the universal Church. Explore the full chronological chain in our complete list of all 267 popes, or read the biographies of neighboring pontiffs linked below.