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Leo III
Pope of the Catholic Church from 795 to 816 (born 750–816)
SaintResearchedPapal StatesDocumented cause
Feast: 12 June (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
750
Died
12 June 816
verified
Beatified
—
not on record
Canonised
1673
verified
Who they were
Leo, a Roman, was unanimously elected pope on 26 December 795. With treasure sent by Charlemagne he became a great benefactor of Rome's churches and charitable houses.
Relatives of his predecessor plotted against him and attacked him. He crowned Charlemagne emperor. He died in 816 and was buried in St Peter's.
The miracles
The Catholic Encyclopedia does not describe the miracles approved in the cause.
Why that counted as sanctity
A pope who was a great benefactor of the poor of Rome.
Connected on this site
- Bernard of Vienne Saint“In 810 he was chosen Archbishop of Vienne, accepting only at the command of Pope Leo III and Charlemagne, and was known for his piety and learning.” — this site's research
- Gregory II Saint“His defiance of Emperor Leo III the Isaurian as a result of the iconoclastic controversy in the Eastern Empire prepared the way for a long series of revolts, schisms, and civil wars that eventually led to the establishment of the temporal power of the popes.” — Wikipedia
- Irene of Athens Saint“Pope Leo III—already seeking to break links with the Byzantine East—used Irene's alleged unprecedented status as a female ruler of the Roman Empire to proclaim Charlemagne as Emperor of the Romans on Christmas Day of 800 under the pretext that a woman could not rule solely and thus the Roman throne was actually vacant.” — Wikipedia
- Charlemagne Blessed“In 800, Charlemagne was crowned emperor in Rome by Pope Leo III.” — Wikipedia
Sources
- Catholic Encyclopedia (1913), via New Advent - Pope St. Leo III
- Wikidata Q132086 — dates, feast day and identifiers (CC0)
- English Wikipedia — Pope Leo III (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.