Drakmar Keutsang is a meditation cave at the Chimpu complex above Samye. It is said to have been the practice cave of Padmasambhava and the site where he first taught the deities of the Eight Commands. Destroyed in the 1960's, it was reconstructed in the 1980's.
Akester, Matthew. 2016. Jamyang Khyentse Wangpo's Guide to Central Tibet. Chicago, IL: Serindia Publications, pp. 333-334.
Gyurme Dorje. 2009. Footprint Guide to Tibet. Bath: Footprint, pp. 216-217.
There are 2 related biographies
The TBRC RID number refers to the unique ID assigned by the Tibetan Buddhist Resource Center (TBRC.org) to each historical figure in their database of Tibetan literature.