Katog Dorjeden Gompa ཀ་ ཏོག་ དོར་ ཇེ་ དེན་ དགོན་པ་
Katok Monastery (Tibetan: ཀཿ་ཐོག་རྡོ་རྗེ་གདན་, THL Katok Dorjé Den), also transliterated as Kathok or Kathog Monastery, is one of the six principal ("mother") monasteries of the Nyingma school of Tibetan Buddhism. It is located in Baiyu County, Garze Prefecture, Sichuan, Katok Monastery is located 4,000m above sea level on the eastern flanks of a mountain range in Baiyu County, Garze, Sichuan. The entire monastery complex is approximately 700m above the valley floor and is accessed by a dirt road containing 18 hairpin turns. The nearest town is Horpo (Chinese: 河坡; pinyin: Hépō), 17 km to the north.
Katok Monastery was founded in 1159 by a younger brother of Phagmo Drupa Dorje Gyalpo, Katok Dampa Deshek, at Derge, the historic seat of the Kingdom of Derge in Kham. Katok Monastery's third abbot, Jampa Bum (1179-1252), whose 26-year tenure as abbot ended in 1252, "is said to have ordained thousands of monks from across Tibet, and especially from Kham region of Minyak (mi nyag), Jang ('byang), and Gyémorong (rgyal mo rong)." The original gompa fell into disrepair and was rebuilt on the same site in 1656 through the impetus of tertöns Düddül Dorjé (1615–72) and Rigdzin Longsal Nyingpo (1625-1682/92 or 1685–1752). Katok Monastery held a reputation of fine scholarship. Prior to the annexation of Tibet in 1951, Katok Monastery housed about 800 monks. Katok was long renowned as a center specializing in the oral lineages (as opposed to terma) and as a center of monasticism, although both of these features were disrupted under Longsel Nyingpo (1625–1692). According to The Tibetan Buddhist Resource Centre, disciples of Kenpo Munsel and Kenpo Jamyang compiled a Katok edition of the oral lineages (Wylie: bka' ma shin tu rgyas pa (kaH thog)) in 120 volumes in 1999: "[T]wice the size of the Dudjom edition, it contains many rare Nyingma treatises on Mahayoga, Anuyoga, and Atiyoga that heretofore had never been seen outside of Tibet.
en.wikipedia.org/wiki/Katok_Monastery