Eleanor of England (Spanish: Leonor; c. 1161^[1] – 31 October 1214^[2][3]), was Queen of Castile and Toledo^[4] as wife of Alfonso VIII of Castile.^[5][6] She was the sixth child and second daughter of Henry II, King of England, and Eleanor of Aquitaine.^[7][8] She served as Regent of Castile during the minority of her son Henry I for 26 days between the death of her spouse and her own death in 1214.^[9]

Eleanor was born in the castle at Domfront, Normandy c. 1161,^[1] as the second daughter of King Henry II of England and his wife Eleanor, Duchess of Aquitaine, and was baptised by Henry of Marcy. Her half-siblings were Countess Marie of Champagne and Countess Alix of Blois. Her full siblings were Henry the Young King, Duchess Matilda of Saxony, King Richard I, Duke Geoffrey II of Brittany, Queen Joan of Sicily and King John. Eleanor had an older brother, William (17 August 1153 – April 1156), the first son of Henry II, and Eleanor of Aquitaine, who died of a seizure at Wallingford Castle, and was buried in Reading Abbey at the feet of his great-grandfather Henry I.

In 1170 Eleanor married King Alfonso VIII of Castile in Burgos at the age of 9.^[1] Her parents' purpose in arranging the marriage was to secure Aquitaine's Pyrenean border, while Alfonso sought an ally in his struggles with Sancho VI of Navarre. In 1177, this led to Henry overseeing arbitration of the border dispute.^[10]

Around 1200, Alfonso began to claim that the duchy of Gascony was part of Eleanor's dowry, but there is no documented foundation for that claim. It is highly unlikely that Henry II would have parted with so significant a portion of his domains. At most, Gascony may have been pledged as security for the full payment of his daughter's dowry. Her husband went so far on this claim as to invade Gascony in her name in 1205. In 1206, her brother John granted her safe passage to visit him, perhaps to try opening peace negotiations. In 1208, Alfonso yielded on the claim.^[11] Decades later, their great-grandson Alfonso X of Castile would claim the duchy on the grounds that her dowry had never been fully paid.

Of all Eleanor of Aquitaine's daughters, her namesake was the only one who was enabled, by political circumstances, to wield the kind of influence her mother had exercised.^[12] In her marriage treaty, and in the first marriage treaty for her daughter Berengaria, Eleanor was given direct control of many lands, towns, and castles throughout the kingdom.^[13] She was almost as powerful as Alfonso, who specified in his will in 1204 that she was to rule alongside their son in the event of his death, including taking responsibility for paying his debts and executing his will.^[14] It was she who persuaded him to marry their daughter Berengaria to Alfonso IX of León. Troubadours and sages were regularly present in Alfonso VIII's court due to Eleanor's patronage.^[15]

Eleanor took a particular interest in supporting religious institutions. In 1179, she took responsibility to support and maintain a shrine to St. Thomas Becket in the cathedral of Toledo. She also created and supported the Abbey of Santa María la Real de Las Huelgas, which served as a refuge and tomb for her family for generations, and its affiliated hospital.^[16]

When Alfonso died, Eleanor was reportedly so devastated with grief that she was unable to preside over the burial. Their eldest daughter Berengaria instead performed these honours. In accordance with the will of her late spouse, Eleanor became regent of Castile during the minority of her son, in which her daughter acted as her advisor.^[17] Her reign was not to be long, however; she was reportedly not in good enough health and left most of the affairs of state to her daughter, which created fear and opposition among the nobles that she was planning to leave the regency to her daughter.^[18]

Eleanor later became sick and died only twenty-six days after her husband, and was buried at Abbey of Santa María la Real de Las Huelgas.^[19]

Eleanor was praised for her beauty and regal nature by the poet Ramón Vidal de Besalú after her death.^[32] Her great-grandson Alfonso X referred to her as "noble and much loved".^[33]

Eleanor was played by actress Ida Norden in the silent film The Jewess of Toledo.^{[citation needed]}