Abayagiri viharaya was a major monastery site of Mahayana.the Abhayagiri Vihara developed as a great institution visââ¬âaââ¬âvis the Mahavihara and the Jetavana Buddhist monastic sects in the ancient Sri Lankan capital of Anuradhapura.Abhayagiri Dagaba was established by King Valagamba during the period of his second reign.Tiya was deluded by the prophecy of another Brahmin that was destined to be king