The dynastic union of Castile and Aragon in 1469, when Ferdinand II of Aragon wed Isabella I of Castile, would eventually lead to the formal creation of Spain as a single entity in 1516 when their grandson Charles V assumed both thrones. See List of Spanish monarchs and Kings of Spain family tree. The Muslim Kingdom of Granada (roughly encompassing the modern day provinces of Granada, Malaga and Almeria) was conquered in 1492, formally passing to the Crown of Castile in that year.