Peter of Castile, also known as Peter the Cruel, was the King of Castile and León from 1350 until his death in 1369. He was born in 1334 and became known for his tumultuous reign, which was marked by conflicts with the nobility and his half-brother, Henry of Trastámara. His rule was characterized by both cultural patronage and violent repression. Peter's reign ended when he was overthrown and killed by Henry of Trastámara, who became king. Despite his controversial legacy, Peter is remembered for his contributions to the arts and his efforts to centralize power in the kingdom. His life and reign have been the subject of various historical interpretations and literary works.