Serkhang, the golden hall of the temple complex has is studded with images (most of them gilded) of deities (51 deities) – mounted on walls or erected on a central altar. The Nako monastery is located () near the India-China border in the trans-Himalayan region in Nako village in Kinnaur district at its western edge. The monastery complex in the village has four temples in an enclosure built with mud walls. It is also dated to the second coming of Buddhism to the region and is credited to Rinchen Zangpo. The area is known for the Nako Lake, which forms part of the border of the village. Though the monastery complex looks simple from outside, in the interiors of the complex, the wall paintings in the monastery are delicately executed. Influence of the Ajanta style of painting, is distinct "in the tonal variation of body hues to produce an effect of light and shade". The elegant divine figures have placid expressions, a reflection of the finest classical art of India. The four temples are well preserved; the main temple and the upper temple considered the oldest of the four structures have the original clay sculptures, murals and ceiling panels – larger temple of these two is known as the 'Translator's Temple'; the third structure is a small white temple, partly dilapidated, has a wooden door frame depicting scenes of the Life of the Buddha carved on the lintel; and the fourth structure is of the same size as the Upper Temple and is also situated next to it, which is known as "rGya-dpag-pa'i lHa-khang" meaning temple of wide proportions. An impression of a foot found near the Nako Lake is ascribed to Guru Padmasambhava. In a nearby village called Tashigang, several caves are found where it is said Guru Padmasambhava meditated and gave discourse to his disciples. An image is stated to grow hair. The trend of building fortified Buddhist monasteries was started from the 14th century onwards. However, very few have survived. Of these, Tangyud monastery, Dhankar monastery and Key monastery in Spiti valley are some of the well known ones. The Tangyud Monastery in the Spiti valley was built in the early 14th century when the Sakyapas rose to power under Mongol patronage. It is built like a fortified castle on the edge of a deep canyon, with massive slanted mud walls and battlements with vertical red ochre and white vertical stripes which make them look much taller than they really are.