Assuming the title of Alamgir, Aurangzeb crowned himself as Emperor on July 21, 1658 at

When Shah Jahan fell ill in September 1657, Aurangzeb challenged Dara, defeated him, imprisoned their father, and assumed imperial authority on July 21, 1658. After liquidating his three brothers, he crowned himself emperor of India, assuming the title Alamgir (Conqueror of the World) at Delhi on June 5, 1659.