 Near this spot in the 14th century the tertön or treasure finder, Sangpo Drakpa, discovered the popular Nyingma text by Padmasambhava called the "Leu Dunma", which is a collection of prayers and devotions.To the north are the massive ruins of the Gyang Bumoche or Gyang Bumpoche, once high, which was built in the style of the Kumbum by the Sakya Sonam Tashi (1352-1417) and the famous polymath and bridge builder, Thang Tong Gyalpo (1385-1464), and decorated in the Lato style of painting.This Jonang-school stupa was also called Tongdrol Chempo ('The Great Chorten that Gives Liberation by Setting Eyes upon It').