Prior to 1479 the separate regions of Spain: Aragon, Asturias, Castile, Galicia, Leon and Navarre had their own kings and queens and were independent of each other. Gradually these regions were conquered by Castile or Aragon. After 1479 the houses of Castile and Aragon were jointly ruled marking the beginning of the Kingdom of Spain. They remained separate entities until 1716.
Father – Charles V Holy Roman Emperor
Mother – Isabella of Portugal
Spouses – Maria Manuela, Mary I of England, Elisabeth of Valois, Anna of Austria
Children – Don Carlos, Isabella, Catherine, Ferdinand, Carlos, Diego, Philip, Maria
Preceded by – Charles I
Succeeded by – Philip III