Pope St. Agatho (79º): Biography, Pontificate & Legacy

Who Was Pope Agatho?

St. Agatho holds the 79º place among Roman pontiffs, with a recorded reign of 27 June 678 –10 January 681 inside late antiquity. (Eastern) Roman citizen. What follows is a structured biography — early life, context, acts, and succession — written for Catholics who want Agatho in context. Catholics also honor him as a saint whose intercession remains part of living devotion.

Early Life & Background

Before election he was known as Agatho. Born circa 577 Panormus, Sicily, Eastern Roman Empire, he entered a world shaped by politics and piety very different from today's global Church.

Historical Context

Agatho (#undefined) governed amid imperial transition, invasions, and debates over Christ's nature — Rome's bishop increasingly seen as a guardian of orthodoxy for the wider Church. Pope during the Third Council of Constantinople(680), the sixth ecumenical council accepted by the Catholic and Eastern Orthodox churches.

Pontificate & Key Events

The pontificate (27 June 678 –10 January 681) centered on governance during late antiquity. (Eastern) Roman citizen. Was of Greek ethnicity. Feast day 10 January.

Papal Acts & Achievements

Acts associated with Agatho (#79, 27 June 678 –10 January 681) still draw historians and Catholics who want more than a one-line summary. Also revered as a saint in Eastern Christianity, with a feast day of 20 February.

Key Highlights

• 79th pope of the Catholic Church
• Pontificate: 27 June 678 –10 January 681
• Venerated as a saint in the Catholic Church
• Feast day 10 January.
• Also revered as a saint in Eastern Christianity, with a feast day of 20 February.
• Pope during the Third Council of Constantinople(680), the sixth ecumenical council accepted by the Catholic and Eastern Orthodox c

Legacy in the Catholic Church

St. Agatho remains pope 79º in the Annuario Pontificio. The Church still points to Agatho's virtues for imitation. Set against late antiquity, Agatho'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 Agatho as pope 79º (27 June 678 –10 January 681) is a way to study how Rome answered the crises of late antiquity. Because the Church venerates Agatho, you may seek his intercession and check his feast in the Martyrology or local calendar. Start with the concrete record: Pope during the Third Council of Constantinople(680), the sixth ecumenical council accepted by the Catholic and Eastern Orthodox churches. Where bulls, conciliar acts, or encyclicals survive from this reign, they repay readers who want primary sources rather than summaries alone. Then step back to the full list of 267 popes to see where Agatho sits between crisis and consolidation.

Place in the Line of Succession

St. Agatho followed Pope Donus (78º, 2 November 676 –11 April 678) after a transition shaped by the politics and piety of their shared century. He was followed by Pope St. Leo II LEO Secundus (80º, 17 August 682 –3 July 683), 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.