Sebastian I of Portugal

Sebastian I became King of Portugal at age three after his grandfather John III's death. His regency was led by his grandmother Catherine of Austria and later Cardinal Henry, setting the stage for his later crusading ambitions.

Sebastian I led a poorly planned crusade into Morocco against the Saadian Sultan. His army was destroyed at Alc

Sebastian's body was never recovered, leading to the myth that he would return to save Portugal. This belief, known as Sebastianism, influenced Portuguese culture and politics for centuries, especially during periods of crisis.