The Tree of EuropeHistorical and genealogical atlas
ESEN
The Tree of Europe · Person

Ferdinand III of Castile

«the Saint»

King of Castile and León, he permanently united both crowns in 1230. His reign was marked by major territorial expansion in Andalusia and the conquest of Córdoba and Seville.

1199 – 1252King of Castile and 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: 30 July 1199 Documented

Death: 30 May 1252 Documented

Role: King of Castile and León

Other recorded names: Ferdinand the Saint

Dynasty: Ivrea-Burgundy · ES

Territories: Castile (ES) · León (ES)

Recorded governments and reigns
King · Castile · Reign Pending review1217–1252Effective rule
King · León · Reign Pending review1230–1252Effective rule
Family network

Recorded relationships

Parents
Partners
Children
Crowns and unions

Their titles over time

Follow the changing territories and offices of Ferdinand III of Castile. Each title retains its own status.

Governments in 1230

  • Crown of Castile2 titles and offices
    View titles and jurisdictions

    Crown of Castile from 1230; the map retains the names Castile and León. Source for this grouping

Annual dates: overlap within one year does not prove that two offices were held on the same day. Regencies and co-rulerships retain their labels.

How these titles came together
  1. 1217 · CastileInheritance · Abdication

    Berengaria inherited after Henry I’s death and ceded the crown to her son Ferdinand. The Castilian inheritance came through his mother.

    Reference
  2. 1230 · LeónInheritance · Agreement

    On Alfonso IX’s death, Ferdinand asserted his right against his half-sisters Sancha and Dulce. The agreement with them enabled the crowns of León and Castile to be united.

    Reference

Selected explained accessions. Other titles remain in the profile’s list of recorded governments.

Documentation

Sources for this profile

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

Evidence for this profile

10 recorded claims · 5 without a claim-specific source. Context references do not by themselves verify every fact.

Dates (2/2 with a precise source)
Family and relationships (3/4 with a precise source)
Governments (0/2 with a precise source)
  • GovernmentPending review

    King · Castile · 1217–1252

    A precise source has not yet been added.
    No individual review recorded ·
  • GovernmentPending review

    King · León · 1230–1252

    A precise source has not yet been added.
    No individual review recorded ·
Successions (0/2 with a precise source)
  • SuccessionPending review

    Castile · Unrecorded successor · 1217

    Berengaria inherited after Henry I’s death and ceded the crown to her son Ferdinand. The Castilian inheritance came through his mother.A precise source has not yet been added.
    No individual review recorded ·
  • SuccessionPending review

    León · Unrecorded successor · 1230

    On Alfonso IX’s death, Ferdinand asserted his right against his half-sisters Sancha and Dulce. The agreement with them enabled the crowns of León and Castile to be united.A precise source has not yet been added.
    No individual review recorded ·
Biographical and contextual references (4)
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.

Keep exploring

More paths from Ferdinand III of Castile