Bon monks guard religious relics at Menri Monastery, which is located 4,700 metres above sea level, in Namling county, Tibet, China, 2015. Menri is a leading Bon monastery in Tibet. The original Bon (Yungdrung Bon) was founded around 16,000 BC, according to the followers who are called Bonpo. Today, Bon can be found in the more isolated parts of northern and western Tibet. According to the Chinese census, about 10% of Tibetans (about 100,000 people) follow Bon.