Pope Innocent III Claims Authority Over Kings
The greater light rules souls, the lesser light rules bodies, and royal power borrows its shine from the papacy
Quick facts
- Pope
- Innocent III (r. 1198-1216 CE)
- Key image
- Sun and moon: pope rules souls, kings rule bodies
- Major acts
- England under interdict, Fourth Lateran Council (1215)
- Also called
- The Fourth Crusade (1202-1204)
What happened
Innocent III, elected pope in 1198 CE, articulated the most expansive claim of papal authority any medieval pope had yet made, describing the pope and secular rulers using the image of the sun and moon: just as God set two great lights in the sky, the greater to rule the day and the lesser the night, so he set two dignities in the church, the greater to rule souls and the lesser to rule bodies. In his letters on papal policy, Innocent wrote plainly that royal power derives the splendor of its dignity from the pontifical authority, positioning secular kingship as dependent on and subordinate to papal sanction. During his reign Innocent intervened directly in disputes over the German and English crowns, placed England under interdict in a conflict with King John, and called the Fourth Crusade and the Fourth Lateran Council, a major reforming council of 1215.
Why it matters
Innocent III's reign is generally treated as the high-water mark of medieval papal power, a claim to authority over kings that provoked direct pushback from secular monarchs for centuries afterward and that the Reformation would, in different ways across different countries, eventually break.
How we know
Innocent III's own letters on papal policy survive in the Vatican's registers and later compiled editions, an administrative record of his stated claims rather than a later historian's summary of them.
Sources
- Internet History Sourcebooks Project, Fordham University. Innocent III: Letters on Papal Policies · Primary source (author-declared)sourcebooks.fordham.edu · Cited as a "primary" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
- Internet History Sourcebooks Project, Fordham University. Fourth Lateran Council, Canon 1 · Primary source (author-declared)sourcebooks.fordham.edu · Cited as a "primary" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- The Crusades → · Innocent III called the Fourth Crusade, which ended with the sack of Constantinople rather than Jerusalem; see the Crusades timeline for that campaign.