Possibly founded in the 13th century, Ki is certainly the largest monastery in Spiti. The prayer chambers are interconnected by dark passages, tortuous staircases and small doors. From a distance, it looks deceptively like the Thiksey Monastery near Leh in Ladakh, but the illusion fades as you get closer. Ki is best reached from Kaza (14 km), and has about 300 lamas in residence. At 13,504 ft, it is built, like most Buddhist formations of the time, at an elevation from the village. The gompa is an irregular heap of low rooms and narrow corridors sitting atop a monolithic, conical hill. Locals make the unlikely claim that this monastery too was built by Rinchen Tsangpo, a belief deceptively lent some credence by the fact that the Ki Gompa is now the seat of Lochen Tulku, the 17th incarnation of the revered founder. The gompa belongs (again like most monasteries in the region) to the Gelugpa sect of Mahayana Buddhism. It has withstood at least three documented Sikh and Dogra invasions in the 19th century (and presumably some before that), and an earthquake in 1975. Although it must have yielded some of its considerable art treasures to these marauders, it still has a priceless collection of thangkas and rare manuscripts, besides weapons and quite an array of wind instruments that feature prominently during the Chaam Festival, celebrated in June-July.