Statistics show the popes of the Catholic Church who served the longest. The longest pontificate is attributed to Pope Pius IX with a duration of 31 years and 8 months (1846-1878). The pontificate of the first pope, Saint Peter, was not taken into account here due to the lack of certainty about its duration.
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Heiliger Stuhl. (April 22, 2025). Popes with the longest pontificates, status as of April 2025 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1656874/popes-with-the-longest-pontifical-reigns/
Heiliger Stuhl. "Popes with the longest pontificates, status as of April 2025." Chart. April 22, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1656874/popes-with-the-longest-pontifical-reigns/
Heiliger Stuhl. (2025). Popes with the longest pontificates, status as of April 2025. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1656874/popes-with-the-longest-pontifical-reigns/
Heiliger Stuhl. "Popes with The Longest Pontificates, Status as of April 2025." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 22 Apr 2025, /statistics/1656874/popes-with-the-longest-pontifical-reigns/
Heiliger Stuhl, Popes with the longest pontificates, status as of April 2025 ÌÇÐÄÆƽâ°æ, /statistics/1656874/popes-with-the-longest-pontifical-reigns/ (last visited July 26, 2026)
Popes with the longest pontificates, status as of April 2025 [Graph], Heiliger Stuhl, April 22, 2025. [Online]. Available: /statistics/1656874/popes-with-the-longest-pontifical-reigns/
