The Banskheda copper plate was found in 1894 AD from a place named Banskheda located in Shahjahanpur district of Uttar Pradesh, in which the date of Harsha Samvat 22 i.e. 628 AD is inscribed. In this, Harshavardhana has been called 'Param Maheshwar'.

The Chinese traveler Xuanzang (629-645 AD) came to India during the reign of Harshavardhana and stayed in his court.

Xuanzang / Yuan Chwang (629-645 AD) was a Chinese traveler who stayed for a long time in the court of Harshavardhana. He witnessed the Kannauj and Prayag conferences of Harsha. His book 'Si-Yu-Ki' contains a detailed description of Indian society.

Harshavardhana was a great scholar and author of Sanskrit. He wrote books named Nagananda, Ratnavali, and Priyadarshika.

Banabhatta was the court poet of Harshavardhana. He wrote books named 'Harshacharita' and 'Kadambari' in Sanskrit. He was a famous scholar of the Sanskrit language.

In the Aihole inscription of Chalukya emperor Pulakeshin II, Harsha has been called 'Saklottarapathnath' (Lord of the entire North India). In Harsha Charita, Harsha has been called 'Chatuh Samudradhipati' and 'Chakravarti Namadheya'.

Banabhatta, Bhushan Bhatta, Dandin, Matanga Divakara, Mayura Bhatta, and Dhavaka were high-class creators in the court of Harshavardhana.

In the post-Gupta era, the center of trade shifted from Ujjain to Kannauj. The importance of Ujjain had increased significantly after the conquest of the Shakas during the Gupta period, when Chandragupta II made it his second capital. In the post-Gupta period, Harsha made Kannauj his capital instead of Thanesar. Due to its location in the Ganga-Yamuna Doab and being an important trade center, it also became a center of attraction for three powers (Palas, Pratiharas, and Rashtrakutas).

Nalanda University was composed of three buildings (libraries) - Ratna Sagar, Ratnodadhi, Ratna Ranjak. Xuanzang, Itsing, Hi En Chin (Light Jewel), Chehang (all Chinese), Hwenyeh, and a Buddhist monk from Korea named Arya Varman received education here.