Henry IV of Castile, King of the Crown of Castile (b. 1425)
Henry IV of Castile (Castilian: Enrique IV; 5 January 1425 – 11 December 1474), King of Castile and León, nicknamed the Impotent, was the last of the weak late-medieval kings of Castile and León. During Henry's reign, the nobles became more powerful and the nation became less centralised.