Drak Yerpa, a complex of ancient caves located east of Lhasa in Taktse County, is said to have been an important site in pre-Buddhist times and later was a meditation site for Buddhist figures such as Songtsen Gampo, Padmasambhava, Atisha, and many others. Legend states that Langdarma's assassin, Lhalung Pelgyi Dorje, hid and meditated in the caves of Drak Yerpa for over two decades. In the eleventh century, a Kadam monastery called Yerpa Drubde was founded at the site. It was later brought under Geluk control. It was badly damaged during the cultural revolution and since has been partially restored.