7th-century maharajadhirajas

thumb|Empire ruled by Harsha, 7th century CE India Harshavardhana (; 4 June 590 – 647) was an emperor of Kannauj from April 606 until his death in 647. He was the king of Thanesar who had defeated the Alchon Huns, and the younger brother of Rajyavardhana, son of Prabhakaravardhana and last king of Thanesar. He was one of the greatest kings of the Kingdom of Kannauj, which under him expanded into a vast realm in northern India.

Prabhakaravardhana (also known as Prabhakara Vardhana) was a king of Thanesar in northern India around the time of the decline of the Gupta Empire. According to the historian R. C. Majumdar, he was the first notable king of the Vardhana dynasty but the fourth ruler from the family, who are also referred to as the Pushpabhutis. He had been preceded by his father, Adityavardhana, grandfather Rajyavardhana I and great-grandfather, Naravardhana, but inscriptions suggest that Banabhatta, the seventh-century bard and chronicler of the Vardhanas, may have been wrong to call these earlier rulers kings