The Three Turnings of the Wheel (of Dharma) refers to a framework for understanding the sutra stream of the teachings of the Buddhism originally devised by the Yogachara school. It later became prevalent in modified form in Tibetan Buddhism and related traditions. The distinction is, on the one hand, a historic or quasi-historic scheme by which the Buddha's first sermons, as recorded in the Pali Canon and the Tripiṭaka of early Buddhist schools, constitute the First Turning, and the later Mahayana sutras comprise the Second and Third turnings. The schema appears in the Samdhinirmochana Sutra, a central Yogachara text, although it may predate it. The model of three turnings of the 'Wheel' is an attempt to categorize the content, philosophical view, and practical application of the whole array of Buddhist sutrayana teachings. In East Asian Buddhism, this classification system was expanded and modified into different doctrinal classifications called 教判 jiàopan which were developed by different Chinese Buddhist schools. Contents of the Three Turnings The basic content and audience of the three turnings of the wheel can be summarized as follows: First Turning The first turning is traditionally said to have taken place at Deer Park in Sarnath near Varanasi in northern India, to an audience of shravakas. It consisted of the teaching of the Four Noble Truths (Sanskrit: catvāry āryasatyāni) and the other elements of the Tripitaka – the Abhidharma, Sutrapitaka and Vinaya. The Abhidharma referred to is the Abhidharma Pitaka of the Sarvastivada school, which is a later composition not taught by the Buddha, and contains philosophy which is antithetical, one may say, to the early teachings. Second Turning The second turning is said to have taken place at Vulture Peak Mountain in Rajagriha, in Bihar, India. The audience comprised bodhisattvas; in some telling there were also shravaka arhats there as well. In the second turning, the emphasis is on emptiness (Skt: śūnyatā) as epitomized in the Prajnaparamita sutras, and on compassion (Skt: ). These two elements form bodhicitta, the epitome of the second turning. The Madhyamika school that Nagarjuna founded arose from his exegesis of the early texts and is included under the second turning. Nagarjuna attacked the metaphysics of the Sarvastivada school and a school which broke away from it called Sautrantika, and promoted, among other things, the classical emphasis on the dependent arising of phenomena of the early texts. Third Turning The first sutra source which