Mughal emperor Muhammad Shah was another great patron of music, poetry and painting, which he continued even after the invasion of India by Persian emperor Nadir Shah. One of his musicians, Niyamat Khan, who was adept in both dhrupad and veena, won the title Sadarang from the emperor for his talents and theoretical and practical knowledge in classical music. He created the elegant classical form of khyal in a majestic and colourful slow tempo (vilambita laya) like dhrupad. Sadarang heightened the classical form of khyal such that it was appreciated by the top-ranking musicians and royal sovereigns of the time. As a result, khyal attained a similar high position to that enjoyed by dhrupad, and gradually came to be developed with many modifications and changes in forms and styles and decorative elements.