# Leo III

> Pope of the Catholic Church from 795 to 816 (born 750–816)

**Wikidata**: [Q132086](https://www.wikidata.org/wiki/Q132086)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Pope_Leo_III)  
**Source**: https://4ort.xyz/entity/leo-iii

## Summary
Leo III was Pope of the Catholic Church from 795 to 816, serving as both spiritual leader and temporal ruler of the Papal States, a confessional state in central Italy. His reign marked a pivotal period in the Church's political and religious authority, shaping the institution's temporal power and diplomatic influence.

## Biography
- Born: 750 (approximate)
- Nationality: Roman (by citizenship in the Papal States)
- Education: Ordained as a Catholic priest and bishop
- Known for: Establishing papal temporal authority and defending the Church's sovereignty
- Employer(s): Papal States (795–816)
- Field(s): Religious governance, political leadership

## Contributions
Leo III's reign as Pope was marked by his defense of the Church's temporal authority and his efforts to maintain papal sovereignty. He played a key role in the political and religious landscape of medieval Europe, shaping the Church's temporal power and diplomatic influence. His leadership during a period of instability helped solidify the Papal States' role as a sovereign entity in central Italy.

## FAQs
**What was Leo III's role as Pope?**
Leo III served as Pope of the Catholic Church from 795 to 816, exercising both spiritual and temporal authority over the Papal States. His reign was marked by his defense of the Church's sovereignty and his efforts to maintain papal temporal power.

**Where did Leo III govern?**
Leo III governed the Papal States, a confessional state in central Italy that encompassed territories under direct papal rule. The state included major cities like Rome, Bologna, and Ferrara, functioning as a sovereign entity until its dissolution in 1870.

**What was the significance of Leo III's reign?**
Leo III's reign was significant for establishing the Church's temporal authority and defending papal sovereignty. His leadership during a period of political instability helped shape the Papal States' role as a sovereign entity in medieval Europe.

## Why They Matter
Leo III's reign as Pope was pivotal in shaping the Church's temporal authority and diplomatic influence. His defense of papal sovereignty during a period of political instability helped solidify the Papal States' role as a sovereign entity in central Italy. His leadership laid the foundation for the Church's temporal power, influencing later developments in religious governance and international relations.

## Notable For
- Served as Pope from 795 to 816, exercising both spiritual and temporal authority
- Defended the Church's sovereignty and maintained papal temporal power
- Governed the Papal States, a confessional state in central Italy
- Played a key role in shaping the Church's political and religious influence during medieval Europe

## Body

### Early Life and Ordination
Leo III was born in approximately 750, though his exact birthplace is not specified. He was ordained as a Catholic priest and bishop, preparing him for his future role as Pope. His early life and education were focused on religious studies and theological training, which would later define his leadership as a spiritual and political figure.

### Papal Reign and Governance
Leo III's reign as Pope began in 795 and lasted until his death in 816. During his tenure, he served as both the spiritual leader of the Catholic Church and the temporal ruler of the Papal States. His governance was marked by efforts to defend the Church's sovereignty and maintain papal temporal authority, particularly in the face of political challenges and external threats.

### Political Leadership and Diplomatic Influence
As Pope, Leo III played a significant role in the political landscape of medieval Europe. He governed the Papal States, a confessional state in central Italy that encompassed territories under direct papal rule. The state included major cities like Rome, Bologna, and Ferrara, functioning as a sovereign entity until its dissolution in 1870. His diplomatic influence extended beyond Italy, shaping the Church's role in international relations and religious governance.

### Legacy and Impact
Leo III's legacy as Pope is marked by his defense of the Church's temporal authority and his efforts to maintain papal sovereignty. His leadership during a period of political instability helped solidify the Papal States' role as a sovereign entity in central Italy. His reign laid the foundation for the Church's temporal power, influencing later developments in religious governance and international relations. The legacy of Leo III continues to be studied in the context of the Church's historical evolution and its impact on medieval Europe.

## References

1. BeWeB
2. Catholic-Hierarchy.org
3. Mirabile: Digital Archives for Medieval Culture
4. BnF authorities
5. CiNii Research
6. Enciclopedia dei Papi
7. Freebase Data Dumps. 2013
8. Czech National Authority Database
9. Virtual International Authority File
10. Autoritats UB
11. CERL Thesaurus
12. Dizionario Biografico degli Italiani
13. Treccani's Enciclopedia on line
14. Enciclopedia Treccani
15. Dizionario di Storia
16. FactGrid
17. National Library of Israel Names and Subjects Authority File
18. Bibliography of the History of the Czech Lands
19. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-0338037-Lev-816)
20. HMML Authority File
21. Digital Scriptorium Catalog