Theravāda is Buddhism's oldest existing school. The school's adherents, termed Theravādins (anglicized from Pali theravādī), have preserved their version of the Buddha's teaching or Dhamma in the Pāli Canon for over two millennia. As of 2010, Theravada is the second largest branch of Buddhism with 36% Buddhists belonging to Theravada, compared to 53% to Mahayana.
The Pāli Canon is the most complete Buddhist canon surviving in a classical Indian language, Pāli, which serves as the school's sacred language and lingua franca. In contrast to Mahāyāna and Vajrayāna, Theravāda tends to be conservative in matters of doctrine (pariyatti) and monastic discipline (vinaya). One element of this conservatism is the fact that Theravāda rejects the authenticity of the Mahayana sutras (which appeared c. 1st century BCE onwards). Consequently, Theravāda generally does not recognize the existence of many Buddhas and bodhisattvas believed by the Mahāyāna school, such as Amitābha and Vairocana, because they are not found in their scriptures.
