Mahayana Buddhism started to become popular during the fifth century of what era? Given the previous question, write a context that contains the answer. It can be 1 - 20 sentences. Context:
Mahayana Buddhism flourished in India from the 5th century CE onwards, during the dynasty of the Guptas. Mahāyāna centres of learning were established, the most important one being the Nālandā University in north-eastern India.