Hieun Tsang, also known as Xuanzang, travelled to India during the reign of Emperor Harshavardhana (606-647 AD). He spent several years at Nalanda Mahavihara, studying Buddhist scriptures, philosophy, and logic. His detailed accounts, recorded in 'Si-Yu-Ki' (Records of the Western Regions), provide invaluable information about the life, administration, education system, and importance of Nalanda University during its peak.