It was common for religious institutions to also be places of higher learning during this era.

The Nalanda Mahavihara (Buddhist grand monastery) is regarded as world's oldest residential university. It is in present day India, though not operating today. Scholars such as Xuanzang (known as Mokṣadeva in Sanskrit) travelled from China (in his case Luoyang) to Nalanda for his studies and returned with thousands of sutras which were then translated. It was knowledge transfer through such universities during the Tang dynasty that brought the number system we use today (originally described in the Bakhshali manuscripts and further refined by Aryabhata and Bhramagupta) to China.