(a) Accounts of Fa-hien — Fa-hien was the earliest Chinese pilgrim who visited India on a religious mission during the reign of Chandragupta II. During his stay in India, he went to Mathura, Kannauj, Kapilavastu, Kushinagar, Vaishali, Pataliputra, Kashi and Rajagriha. He gave unbiased details of that period. He gave following accounts:
- According to him, Magadha was a prosperous country with large towns.
- Pataliputra was a flourishing city with numerous charitable institutions including a hospital.
- People were wealthy but led simple lives following the Buddhist rule of conduct.
- Vaishnavism, Shaivism, Buddhism and Jainism were main religions. People had no ill-will towards other sects.
- Hindu Gods and Goddesses were depicted on coins and also in sculptures and paintings.
- The penal code was mild and the offences were ordinarily punished by fines only.
(b) The Allahabad Pillar Inscription — It is one of the important epigraphic evidences of the Imperial Guptas. It is also known as Prayag Prashasti and is written in praise of Samudragupta by his court poet Harisena. It describes the reign of Guptas in ancient India. It provides an impressive list of Kings and Tribal republics that were conquered by Samudragupta. The inscription is also important because of the political geography of India that it indicates by naming the different Kings and people who populated India in the first half of the 4th century AD.
(c) Nalanda University — Located in Rajagriha ,Bihar, Nalanda University was ancient India's most renowned post-graduate institution, featuring imposing buildings, eight colleges, and three great libraries (Ratnasagar, Ratnadadhi, and Ratnaranjak). Enclosed by a brick wall, it hosted over 10,000 students and teachers from across Asia, including China, Japan, and Tibet. Admission was highly selective, with a rigorous entrance exam that only about 20% of the most brilliant students passed. The curriculum comprehensively covered the four Vedas, logic, grammar, medicine, various philosophical schools, and Buddhist works, until the university was ultimately destroyed by Bakhtiyar Khilji.