Crown of Castile

The Crown of Castile was a major political and administrative entity in medieval and early modern Spain, formed after the medieval Kingdom of Castile united with the Kingdom of León in the 13th century. It encompassed regions like Castile, León, and later other territories, functioning as a unified kingdom under a single monarch. The Crown of Castile was a key part of Spain's central authority, overseeing governance, law, and expansion during the Reconquista and the age of exploration. Its influence extended to overseas colonies, shaping Spain’s geopolitical and colonial empire in the Americas and beyond.