Pope Gregory XIII
Pope of the Catholic Church from 1572 to 1585 (1502–1585)
- Fame68.1
- Momentum15.0
- Italy rank#247
Source-basedStable
- Fame68.1
- Momentum15.0
- Italy rank#247
- Religious Figures rank#15
- Wikipedia17.3K
Lived 1502–1585, aged 83Italy
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Summary
Updated 2026-06-21
He remade time itself. Every date you write, every calendar you check — that's his doing. The pope who saw that the Julian calendar had drifted ten days out of sync with the solar year and corrected it in 1582, embedding his name in the daily life of the entire planet.
Biography
About
Ugo Boncompagni was born 7 January 1502 and rose through the Church to become Pope Gregory XIII on 13 May 1572, taking the helm of both the Catholic Church and the Papal States. His papacy's defining act was commissioning the calendar reform that bears his name — the Gregorian calendar, which corrected the drift in the old Julian system and remains the international civil standard centuries later. He ruled until his death on 10 April 1585, but the calendar outlasted him, quietly organizing the days of believers and nonbelievers alike.
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Fame
Stable68.1
Composite of search demand, mentions, audience & graph footprint.
Score components
Momentum15.0
Historical24.6
Now attention22.0
Source confidence60.0
Completeness70.0
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- WikidataHigh confidencewikidata · wikidata.org
- WikipediaHigh confidencewikipedia · en.wikipedia.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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