This is a list of kings regnant and queens regnant of the Kingdom and Crown of Castile. For their predecessors, see List of Castilian counts.
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👉 Queen of Castile in the context of Joanna of Castile
Joanna of Castile (6 November 1479 – 12 April 1555), historically known as Joanna the Mad (Spanish: Juana la Loca), was the nominal queen of Castile from 1504 and queen of Aragon from 1516 to her death in 1555. She was the daughter of Queen Isabella I of Castile and King Ferdinand II of Aragon. Joanna was married by arrangement to the Austrian archduke Philip the Handsome on 20 October 1496. Following the deaths of her elder brother John, elder sister Isabella, and nephew Miguel between 1497 and 1500, Joanna became the heir presumptive to the crowns of Castile and Aragon. When her mother died in 1504, she became queen of Castile. Her father proclaimed himself governor and administrator of Castile.
In 1506, Joanna's husband Philip became king of Castile jure uxoris as Philip I, initiating the rule of the Habsburgs in the Spanish kingdoms. Philip died that same year. Despite being the ruling queen of Castile, Joanna had little effect on national policy during her reign as she was declared insane and confined in the Royal Palace in Tordesillas under the orders of her father, who ruled as regent until his death in 1516, when she inherited his kingdom as well. Her son Charles I became king, and during his reign Joanna was nominally co-monarch but remained confined until her death. Joanna died aged 75 in 1555, at which point her son Charles, the Holy Roman Emperor, became the sole ruler of Castile and Aragon.
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Queen of Castile in the context of Isabella I of Castile
Isabella I (Spanish: Isabel I; 22 April 1451 – 26 November 1504), also called Isabella the Catholic (Spanish: Isabel la Católica), was Queen of Castile and León from 1474 until her death in 1504. She was also Queen of Aragon from 1479 until her death as the wife of King Ferdinand II. Reigning together over a dynastically unified Spain, Isabella and Ferdinand are known as the Catholic Monarchs. Her reign marked the end of Reconquista and also the start of Spanish Empire and dominance of Spain over European politics for the next century.
Isabella's marriage to Ferdinand of Aragon in 1469 created the basis of the de facto unification of Spain. With Ferdinand's help, she won the War of the Castilian Succession, securing her position as Queen of Castille. Isabella reorganized the governmental system, brought the crime rate down, and unburdened the kingdom of the debt which her half-brother King Henry IV had left behind. Her reforms and those she made with her husband had an influence that extended well beyond the borders of their united kingdoms.
Queen of Castile in the context of Berengaria of Castile
Berengaria (Castilian: Berenguela), nicknamed the Great (Castilian: la Grande) (1179 or 1180 – 8 November 1246), was the queen of Castile who ascended the throne in 1217, and previously queen of León from 1197 to 1204 as the second wife of King Alfonso IX. As the eldest child and heir presumptive of Alfonso VIII of Castile, she was a sought-after bride, and was engaged to Conrad, the son of Holy Roman Emperor Frederick I. After Conrad's death, she married her cousin Alfonso IX of León to secure the peace between him and her father. She had five children with him before their marriage was voided by Pope Innocent III.
When her father died, Berengaria served as regent for her younger brother Henry I in Castile until she succeeded him on his untimely death. Within months, she had her son Ferdinand III acclaimed king. She continued guiding policy, negotiating, and ruling for the rest of her life. She was responsible for the re-unification of Castile and León under her son's authority, and supported his efforts in the Reconquista. She was a patron of religious institutions and supported the writing of a history of the two countries.