King Ahasuerus is a figure from the biblical Book of Esther, traditionally identified with the Persian king Xerxes I. He ruled over a vast empire that included many nations and was known for his wealth and power. Ahasuerus is best known for his role in the story of Esther, where he unwittingly becomes involved in a plot to destroy the Jewish people. In the narrative, Ahasuerus holds a grand feast and later seeks a new queen after deposing his first wife, Vashti. Esther, a Jewish woman, becomes his queen and ultimately plays a crucial role in saving her people from destruction. The story highlights themes of courage, identity, and divine providence.