Sancho IV of Castile

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Sancho IV
Sancho IV de Castilla.jpg
Sancho in a contemporary manuscript.
King of Castile and León
Reign 4 April 1284 – 25 April 1295
Predecessor Alfonso X
Successor Ferdinand IV
Born (1258-05-12)12 May 1258
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Burial Cathedral of Toledo
Consort María de Molina
among others...
Isabella, Queen of Aragon
Ferdinand IV of Castile
Beatrice, Queen of Portugal
House House of Ivrea Burgundy
Father Alfonso X of Castile
Mother Violant of Aragon
Religion Roman Catholicism

Sancho IV the Brave (12 May 1258 – 25 April 1295) was the King of Castile, León and Galicia from 1284 to his death. He was the second son of Alfonso X and Yolanda, daughter of James I of Aragon.


His elder brother, Ferdinand de la Cerda, died in November 1275, and in 1282 Sancho assembled a coalition of nobles to declare for him against Ferdinand's son Alfonso, then took control of the kingdom when Alfonso X died in 1284. This was all against the wishes of their father, but Sancho was crowned in Toledo nevertheless.

Sancho's ascension was in part due to his rejection of his father's elitist politics. Sancho was recognised and supported by the majority of the nobility and the cities, but a sizable minority opposed him throughout his reign and worked for the heirs of Ferdinand de la Cerda. One of the leaders of the opposition was his brother John, who united to his cause the lord of Biscay, Lope Díaz III de Haro. Sancho responded by executing the Lord of Biscay and incarcerating his brother. According to the chroniclers, he cemented his hold on power by executing 4,000 other followers of Infante Alfonso, son of Ferdinand de la Cerda, in Badajoz. He executed 400 more in Talavera and more in Ávila and Toledo.

Upon dispensing with this opposition, Sancho pardoned his brother, who was released. John bided his time before fomenting revolt again: the conflict over Tarifa. He called in the aid of the Marinids in Morocco and besieged Guzmán the Good in his castle (1291). At this siege occurred that famous act of heroism, the innocent death of the son of Guzmán. Tarifa was faithfully defended until Sancho could rescue it and the Marinids retreated to Magreb. The intent of both John and the Sultan of Marinids (to invade) was foiled.

When James II succeeded to the Crown of Aragon, he endeavoured to bind the two crowns more closely and to unite in the Reconquista. Indeed, both of James' predecessors had tried to do likewise. Sancho was also the friend and tutor of Manuel of Castile.

Just before succumbing to a fatal illness (possibly tuberculosis) he appointed his wife, María de Molina, to act as regent for his nine-year-old son, Ferdinand IV. He died in 1295 in Toledo.


Sancho married Maria de Molina in 1282, but at first their marriage did not have the necessary papal dispensation for two reasons: First, they had a distant blood relation, and second, Sancho had been betrothed as an infant to a rich Catalan heiress named Guillerma Moncada.

They had the following children:

He had three illegitimate children:

By María Alfonso Téllez de Menezes (d. Toro), wife of Juan García, Lord of Ucero:

by another woman whose name is unknown, he had:

  • Alfonso Sánchez, who married, as his second wife, María Díaz de Salcedo, but died without issue.


Family of Sancho IV of Castile
16. Ferdinand II of León
8. Alfonso IX of León
17. Urraca of Portugal
4. Ferdinand III of Castile
18. Alfonso VIII of Castile
9. Berengaria of Castile
19. Eleanor of England
2. Alfonso X of Castile
20. Frederick I, Holy Roman Emperor
10. Philip of Swabia
21. Beatrice I, Countess of Burgundy
5. Elisabeth of Hohenstaufen
22. Isaac II Angelos
11. Irene Angelina
23. Unknown Palaiologina?, afterwards Irene
1. Sancho IV of Castile
24. Alfonso II of Aragon
12. Peter II of Aragon
25. Sancha of Castile
6. James I of Aragon
26. William VIII of Montpellier
13. Marie of Montpellier
27. Eudokia Komnene
3. Violant of Aragon
28. Béla III of Hungary
14. Andrew II of Hungary
29. Agnes of Antioch
7. Violant of Hungary
30. Peter II of Courtenay
15. Yolanda de Courtenay
31. Yolanda of Flanders


  1. Medieval Iberia: An Encyclopedia, Ed. E. Michael Gerli and Samuel G. Armistead, (Routledge, 2003), 50.
  2. XXV años de la Escuela de Genealogía, Heráldica y Nobiliaria, Ed. Escuela de Genealogía, Heráldica y Nobiliaria, (Hidalguia, 1985), 431.


  • XXV años de la Escuela de Genealogía, Heráldica y Nobiliaria, Ed. Escuela de Genealogía, Heráldica y Nobiliaria, Hidalguia, 1985.
Sancho IV of Castile
Born: 12 May 1258 Died: 25 April 1295
Regnal titles
Preceded by King of Castile and León
Succeeded by
Ferdinand IV