Dharmapala, the Pala emperor, established Vikramasila monastery in the 8th century CE as a major center of Buddhist learning and scholarship. It became one of the most important universities in ancient India, rivaling Nalanda. The other options are rulers from different periods - Shashanka (7th century Bengal), Devapala (Dharmapala's successor who expanded the empire), and Lakshmanasena (12th century Sena ruler).