Joanna of Castile

After the death of her husband Philip I, Joanna of Castile became the nominal queen of Castile. However, her father Ferdinand II of Aragon and later her son Charles I of Spain assumed regency, citing her mental instability. Joanna was confined to the castle of Tordesillas for the rest of her life.

After the death of her husband Philip I, Joanna refused to remarry, despite pressure from her father Ferdinand II and other nobles. Her refusal was interpreted as a sign of mental instability, but it also reflected her deep attachment to Philip and her desire to maintain her independence.

Joanna of Castile was confined to the Royal Palace of Tordesillas by order of her father Ferdinand II, who declared her unfit to rule. She remained imprisoned there for 46 years, isolated from political affairs, while her son Charles I governed Castile in her name.