Before Kannauj, the capital of the Harshavardhana was?

Harshavardhana was an Indian Emperor, who ruled over the northern parts of India from 606 AD to to 647 AD. His earliest capital was Thaneswar, present-day Haryana. After his accession, King Harshavardhan united the two kingdoms of Thanesar and Kannauj. He also shifted his capital from Thanesar to Kannauj.