A mountain made of stone
The central idea behind Angkor Wat is that a temple can be a mountain. In Hindu and Buddhist cosmology, Mount Meru is the axis of the universe, home of the gods, ringed by mountain ranges and an ocean. Khmer kings built temples that imitate this structure, and architectural historians call the type a temple-mountain. A stepped pyramid or terraced platform stood for the peak, a sanctuary at the summit housed the deity, and the whole stood within a boundary that evoked the surrounding seas.
Angkor Wat is the most elaborate and best preserved of these. Its plan is nearly a diagram of the idea, but it also reflects specific decisions by the architects of Suryavarman II’s reign, which are worth looking at one by one.
The layout from outside to centre
Seen from above, the temple has a clear sequence.
- A moat roughly 1.5 km by 1.3 km measured on its outer edge forms the outermost boundary, representing the cosmic ocean.
- A stone causeway crosses the moat to a monumental western entrance building, with a long raised avenue beyond it.
- The outer enclosure wall surrounds a large open courtyard.
- At the heart of the complex is the main temple, built on a raised platform with three nested rectangular levels, each higher than the one before.
- The first level has a gallery of carved reliefs, the second a smaller enclosed gallery, and the third supports the central group of five towers.
The five towers are arranged in a quincunx: four at the corners of the top level, and the tallest one in the middle, about 65 metres above the ground. From the front, usually only three seem to be visible, the others being hidden by perspective. The central tower housed the main sacred image, probably of Vishnu, which was later replaced by Buddhist images.
Galleries instead of solid tiers
Earlier Khmer temple-mountains often used solid, stepped tiers of stone or brick, with small shrines on top. At Angkor Wat the tiers are not solid blocks seen from outside. Instead, covered galleries with columned windows run around each level, and the interior is accessible. Corner towers and entrance pavilions break up the long lines, and cross-shaped terraces connect the levels with stairs on the four sides. The result is a building that is both a symbolic mountain and a structure with enclosed, walkable space.
The galleries link to a second feature: the outer gallery is a continuous corridor decorated with reliefs, and it is read in a counter-clockwise direction. That direction, called prasavya in Sanskrit, is the reverse of the usual direction for circumambulating a Hindu shrine and is commonly associated with funerary rites. This is one reason many scholars see the temple as having a funerary role for Suryavarman II.
Why does it face west?
Almost all major Khmer temples face east, the direction of the rising sun and of auspicious beginnings. Angkor Wat faces west, which is a major puzzle for the study of the building. Two explanations dominate.
First, west is the direction associated with Vishnu in some Hindu texts, so the orientation may reflect the dedication. Second, west is linked to death and the setting sun, which fits the idea of the temple as the king’s funerary monument as well as a state shrine. The two ideas are compatible, and neither is proven. Some scholars also note that the entrance road, the layout of the surrounding city and the earlier routes may have affected the decision.
Alignment with the sun is also frequently mentioned. From the western causeway, the sun can be seen to rise behind or near the central tower at around the equinox. The effect is real as a general observation, but the claim that the temple encodes complex astronomical knowledge or calendars rests on interpretation more than on documents, and it should be treated with caution.
Compared with other Khmer temples
Several earlier temples help show what Angkor Wat inherited and what was new.
- Bakong, a late ninth-century temple near Roluos, is a five-tiered stepped pyramid with a central tower, one of the first large stone temple-mountains.
- Phnom Bakheng, built around 900 on a natural hill, had a stepped pyramid crowned by five towers and was the centre of the first city at Angkor.
- Pre Rup and the Eastern Mebon, from the mid-tenth century, used laterite and brick with stone details and a multi-level platform.
- The Baphuon, of the eleventh century, was a tall pyramid with a long raised walkway.
- Banteay Srei, from the late tenth century, is a small temple rather than a temple-mountain. It is known for its pink sandstone and fine carving.
Compared with these, Angkor Wat combines scale, symmetry and a unity of design that is unusually complete. It is a deliberate summation of the type. Later, in the reign of Jayavarman VII, builders did not repeat the formula, and the Bayon follows a different, more irregular logic.
Beyond the Khmer world
The idea of a sacred building as a model of the cosmos is not unique to Angkor. Pyramids at the Giza pyramid complex served as royal tombs with their own cosmic meanings, and Egyptian temple architecture also expressed ideas about creation. In Mesoamerica, Maya pyramids supported temples on their summits, and in North America, the platform mounds at Cahokia carried important buildings. These cultures were not connected, and the resemblance reflects similar human responses to the idea of a sacred height rather than shared origins. What distinguishes Angkor Wat is the way it joins this idea to roofed galleries, a narrative cycle of reliefs and a vast moat in a single design.
What remains uncertain
Some details of the temple’s use are not recorded. How often and by whom the inner levels were entered, what rituals took place, and how the king’s role in them was organised are all matters of inference. The entrance to the topmost level was probably restricted in the twelfth century, and modern visitors’ access to it reflects present-day arrangements rather than ancient ones. These gaps do not diminish the clarity of the plan, which remains one of the most readable ancient designs in the world.