Harsha Vardhan was also known as 'Shiladitya'. He was an Indian emperor who ruled North India from 606 to 647 CE. He belonged to Pushyabhuti dynasty; and was the son of Prabhakarvardhana who defeated the Huna invaders, and the younger brother of Rajyavardhana, a king of Thanesar, present-day Haryana. At the height of Harsha's power, his Empire covered much of North and Northwestern India, extended East till Kamarupa, and South until Narmada River; and eventually made Kannauj (in present Uttar Pradesh state) his capital, and ruled till 647 CE. The Chinese traveler Hsuan tsang mention him as 'Shiladitya'.