Key Monastery is a prominent Buddhist monastery located in the Spiti Valley of Himachal Pradesh, India. Founded in the 11th century, it is one of the oldest and largest monasteries in the region, serving as a spiritual center for the Gelugpa sect of Tibetan Buddhism. The monastery is perched on a hilltop at an altitude of about 4,166 meters, offering stunning views of the surrounding landscape. The architecture of Key Monastery features traditional Tibetan design, with whitewashed walls and colorful prayer flags. It houses a collection of ancient scriptures, murals, and thangkas, which are important for the study and practice of Buddhism. The monastery also hosts annual festivals that attract visitors and pilgrims from around the world.