Tibetan Buddhism provided continuity to the Nalanda tradition, as Buddhism declined and eventually died out in India. In Tibet, the main lineages are known as Nyingma, Kagyu, Sakya, and Gelug. The Gelug tradition, which is followed by Saraswati Buddhist group, stemming from Lama Tsong Khapa (1357-1419) centres on three great seats of learning named Ganden, Drepung and Sera, originally located around Lhasa, the capital of Tibet. Since the Chinese occupation and Tibetan diaspora most of their activity takes place at their re-established locations in South India. Thus the Tibetans have brought Buddhism back to its birthplace.