King of Castile and León (1406–1454) whose long reign was dominated by his favourite Álvaro de Luna and the turbulent high nobility; father of Isabella I.
John II of Castile was king of Castile and León from 1406 to 1454, one of the longest reigns in Castilian history, though he ruled in his own right for little of it. He succeeded his father Henry III as an infant, and his childhood was governed by a long regency under his mother Catherine of Lancaster and his uncle Ferdinand of Antequera.
His reign is remembered above all for his dependence on his favourite, the constable Álvaro de Luna, who effectively governed Castile for decades amid constant conflict with the great nobles, before John was pressured into having him executed in 1453. A cultivated patron of poetry, John II left the throne in 1454 to his son Henry IV — and was also the father, by his second marriage, of the future Isabella I.
John was born in 1405 and became king in 1406 at little over a year old, on the death of his father Henry III. His long minority was managed by a regency shared between his mother, Catherine of Lancaster, and his uncle Ferdinand, who left to become king of Aragon in 1412 — an arrangement that entangled Castilian and Aragonese politics through the ambitious "Infantes of Aragon", John's own cousins, who would trouble his whole reign.
John II is remembered as a cultivated but politically weak king, more interested in letters, music, and the pleasures of the court than in the hard work of rule. His reign became a byword for government by favourite: he handed effective power to Álvaro de Luna and clung to him through decades of noble revolt, unable or unwilling to govern without him.
Contemporary and later judgement is largely unflattering, presenting a ruler dominated in turn by his favourite, his cousins the Infantes of Aragon, and finally his second wife. Yet his court was a genuine centre of Castilian culture, and his own patronage of poetry and learning was real. He appears as an amiable, refined, and irresolute king whose long reign was run by stronger personalities around him — and whose final, reluctant consent to Álvaro de Luna's execution in 1453 is remembered as the tragic act of a man destroying the servant he could not do without.
For most of his adult reign John II left the government of Castile to Álvaro de Luna, whom he made constable and who dominated the kingdom against the recurring revolts of the high nobility and the intrigues of the Infantes of Aragon. Luna's Castile won a notable victory over Granada at the Battle of La Higueruela in 1431, but his power rested entirely on the king's favour.
That favour finally failed. Pressured by the nobility and by his second wife, Isabella of Portugal, John consented to Álvaro de Luna's arrest and execution in 1453. He survived his favourite by barely a year, dying in 1454 and leaving to his son Henry IV a kingdom exhausted by decades of aristocratic conflict.
John II died at Valladolid on 20 July 1454, a little over a year after the execution of Álvaro de Luna, and was buried in the magnificent tomb his son commissioned at the Cartuja de Miraflores. His son Henry IV succeeded him.
John II's long reign is remembered as an age of aristocratic turbulence and government by favourite, which left the Castilian monarchy weakened. Its most consequential legacy, however, lay in his children: his son Henry IV, whose disputed succession would convulse Castile, and his daughter by his second marriage, the future Isabella I, whose union with Ferdinand of Aragon would create a unified Spain. John II thus stands, for all his weakness, at the immediate root of the Catholic Monarchs.