Nagarjuna (150-250 CE), the founder of the Madhyamaka (Middle Way) school of Mahayana Buddhism, propounded Sunyavada - the philosophy of emptiness (sunyata), which states that all phenomena are empty of inherent existence. His teachings are preserved in texts like the Mulamadhyamakakarika. Moggaliputta Tissa chaired the Third Buddhist Council, Asvaghosa was a poet-saint, and Vasubandhu founded the Yogacara school.