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The Tree of Europe · Person

Alfonso IX of León

King of León for more than four decades. He convened the Cortes of 1188, and his dynastic policy made possible the permanent union of León and Castile through Ferdinand III.

1171 – 1230King of LeónIvrea-Burgundy · ES
Explore this family · Spanish AtlasBack to people

This complete profile is available in English. Bibliographic titles retain their original language. Links marked ES open the Spanish edition.

Historical profile

Key details

Birth: 15 August 1171 Documented

Death: 24 September 1230 Documented

Role: King of León

Dynasty: Ivrea-Burgundy · ES

Territories: León (ES)

Recorded governments and reigns
King · León · Reign Pending review1188–1230Effective rule
Family network

Recorded relationships

Partners
Berengaria of CastilePending review
Children
Documentation

Sources for this profile

Biographical and contextual references in their original language. Sources and methodology.

Evidence for this profile

4 recorded claims · 2 without a claim-specific source. Context references do not by themselves verify every fact.

Dates (2/2 with a precise source)
Family and relationships (0/1 with a precise source)
  • Marriage or partnershipPending review

    Berengaria of Castile

    A precise source has not yet been added.
    No individual review recorded ·
Governments (0/1 with a precise source)
  • GovernmentPending review

    King · León · 1188–1230

    A precise source has not yet been added.
    No individual review recorded ·
Biographical and contextual references (3)
Editorial history
  • 2026-10-12 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-08 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-03 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-09-30 · The duchy is limited to Dijon and Autun; each other fief now enters the map only under its dated ruler. John III of Namur and the Nevers/Rethel branch were added. The previous shape combined later counties and unrelated lands as if all belonged to the duchy from 1363.
  • 2026-09-28 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.

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