Alchi Monastery topographic conditions, only two survived, one of them the esteemed scholar and translator Rinchen Zangpo who established Buddhist activity in the Ladakh region and other areas of India including Himachal Pradesh and Sikkim. During his sojourn there, he also went to the neighbouring countries of Nepal, Bhutan and Tibet. Zangpo became known by the epithet "Lohtsawa" or the "Great Translator"; he is credited with building 108 monasteries in the trans-Himalayan region in his quest to disseminate Buddhism. He institutionalized Buddhism in the region; these monasteries are considered the mainstay of Vajrayana of Tibetan Buddhism (also known as Lamaism). Zangpo engaged
Buddhism in Nepal Buddhism which began in the 1920s. Also, the rediscovery of Lumbini, the birthplace of Buddha, occurred in this era with contributions from among others, General Khadga Sumsher Rana. After the overthrow of the Rana dynasty in 1951, Buddhism gradually developed in the country. Theravada Buddhists played a greatly significant role for the Buddhist revival campaign in modern Nepal since the 1920s. This revival movement has changed Buddhism from a religion of some ethnic groups and castes to going beyond the caste and ethnic religion in Nepal. Presently, there are three main Buddhist schools; Tibetan Buddhism, Newar Buddhism and Theravada Buddhism.