Angkor Wat
The Khmer Capital, Its Waterworks, and Its Decline
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The site reveals a complex hydraulic system that once supported a city of over one million people. Chapters explore the temple's transformation from Hindu to Buddhist use, its astronomical alignments, and how lidar technology uncovered the vast waterworks network beneath the jungle. The book traces the decline of the Khmer Empire through drought and failed irrigation systems.
This audiobook covers everything from the temple's etymology to modern tourism challenges, including European rediscovery and current conservation efforts. Anyone interested in ancient engineering, religious history, or Southeast Asian civilization will find this essential listening.
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The name Angkor Wat comes from the Khmer language, where “Angkor” means “city” or “capital city,” and “Wat” means “temple grounds” or “enclosure.” The word Angkor itself is a vernacular form of nokor, which traces back to the Sanskrit or Pali word nagara. Wat derives from vāṭa, also from Sanskrit or Pali. The temple was originally called Vrah Viṣṇuloka or Parama Viṣṇuloka, meaning “the sacred dwelling of Vishnu.” Some interpretations suggest it could also mean “The king who has gone to the supreme world of Vishnu,” a title posthumously given to Suryavarman II, meant to honor his memory and legacy.
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Angkor Wat was built in the early 12th century at the request of King Suryavarman II, who ruled from around 1113 to 1150. Construction began in 1122 and finished by 1150, following advice from the scholar Divākarapaṇḍita. The temple was dedicated to the Hindu god Vishnu and served as the king’s state temple in the capital city of Yaśodharapura, which is modern-day Angkor. It was designed as a vast temple-city, though recent studies suggest it may have supported between 3,000 and 4,300 residents. Its original name remains unknown, although it might have been called Vrah Viṣṇuloka after its main deity. After the king’s death, work stopped, leaving some of the bas-reliefs unfinished.
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In 1178, about twenty-seven years after Suryavarman II died, Angkor was attacked and sacked by the Chams, who were long-time enemies of the Khmer. The Khmer empire was then restored by Jayavarman VII, who moved the capital to Angkor Thom and built the Bayon as the state temple, located to the north. The temple was dedicated to Buddhism because Jayavarman VII’s wife, Indradevi, was a devoted Mahayana Buddhist who encouraged him to convert. Over time, Angkor Wat itself became a Buddhist site, with Hindu sculptures gradually replaced by Buddhist art.
After the shift to Buddhism toward the end of the 12th century, Angkor Wat remained a Buddhist site until today. Chinese envoy Zhou Daguan and explorer Zheng He visited in the 13th and 14th centuries; Zheng He studied its architecture, which later influenced the Dabaoen Temple and Glazed Pagoda. Archaeologists believe it may have functioned as a fortification during this time, with evidence of blockages at gateways and holes in the outer wall, possibly part of defenses against the Ayutthaya Empire. Following the Khmer empire's fall to Ayutthaya in 1431, Angkor Wat was still maintained, with records showing continued pond upkeep. Unlike many Angkor temples, it was never fully abandoned. Inscriptions from the 17th century reveal Japanese Buddhist pilgrims lived nearby, including Ukondayu Kazufusa, who celebrated the Khmer New Year there in 1632. In the mid-1600s, modifications occurred, with several towers reportedly demolished.
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In the 16th century, Portuguese traders and missionaries stumbled upon a massive stone city hidden deep in northern Cambodia, where it had been silent for over 150 years. At its center stood Angkor Wat—the largest religious monument of its kind. A Capuchin friar named António da Madalena was among the first to enter the ruins, exploring them in 1586. Three years later, he reported what he’d seen to someone who would record it for history: Diogo do Couto, who included the account in his writings.
Half a league from this city stands a temple known as Angar, built with such remarkable skill that no description written by pen could fully capture its wonder. It is unlike any other structure on Earth, featuring towers and intricate decorations that reflect the highest achievements of human creativity. The temple is surrounded by a moat, and visitors must cross a single bridge to enter. This bridge is guarded by two massive stone tigers, so grand and intimidating they strike fear into all who approach.
In 1860, French naturalist and explorer Henri Mouhot effectively rediscovered the temple with help from missionary Father Charles-Émile Bouillevaux. Mouhot brought the site to Western attention through his travel notes, where he wrote: “One of these temples, a rival to that of Solomon, and erected by some ancient Michelangelo, might take an honorable place beside our most beautiful buildings. It is grander than anything left to us by Greece or Rome, and presents a sad contrast to the state of barbarism in which the nation is now plunged.”
In 1864, nearly two decades after his death, Henri Mouhot’s work was finally published by the Royal Geographical Society under the title Travels in the Central Parts of Indo-China, Siam, Cambodia and Laos. His writings brought Angkor to European attention, though his accounts lacked illustrations. Four years earlier, in 1861, German anthropologist Adolf Bastian began a four-year journey through Southeast Asia. His findings were later published in 1868 as The People of East Asia, a six-volume study that also described the Angkor monuments but, like Mouhot’s work, did not include drawings of the sites.
France took control of Cambodia in 1863, partly because of the impressive art and architecture at Angkor Wat and other monuments in the region. This move came after France invaded Siam. As a result, Cambodia was able to regain control of areas in the northwest, including Siem Reap, Battambang, and Sisophon, which had been under Siamese rule since 1795. Later excavations at Angkor revealed no signs of ordinary homes or daily life—no cooking tools, weapons, or clothing were found, unlike typical ancient sites.
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In the 20th century, efforts began to clear the overgrowth and restore the temple complex at Angkor Wat. The Conservation d'Angkor was established by the École française d'Extrême-Orient in 1908. This organization was responsible for research, conservation, and restoration work at Angkor until the early 1970s. Major restoration efforts took place during the 1960s.
Restoration work at Angkor Wat was halted when the Khmer Rouge took control of Cambodia in the 1970s and 1980s. The Conservation d'Angkor was disbanded in 1975, and Khmer Rouge forces used remaining wood for firewood. A shoot-out between Khmer Rouge and Vietnamese troops left bullet holes in some bas reliefs. By the late 1980s and early 1990s, art thieves based in Cambodia caused further damage by removing sculptures and earlier reconstructions. Like many of Cambodia’s ancient temples, Angkor Wat suffered from plant overgrowth, fungi, ground movement, war damage, and theft. Though the war damage to Angkor Wat was less severe than elsewhere in the country, the site still faced serious deterioration.
Between 1986 and 1992, the Archaeological Survey of India restored parts of the temple while France did not recognize the Cambodian government at the time. Critics have pointed out problems with both the early French restoration efforts and the later work done by India. Concerns were raised about damage to the stone surfaces caused by chemicals and cement used during these restorations.
In 1992, Angkor Wat was named a UNESCO World Heritage Site, and at the same time, it was listed as being in danger, a status that was removed in 2004. This followed an appeal for help from Norodom Sihanouk and a call from UNESCO to the international community to save the site. A protective zone was created in 1994, and in 1995, the Authority for the Protection and Management of Angkor and the Region of Siem Reap, known as APSARA, was formed. In 1996, a law to protect Cambodian heritage was passed.
In the 21st century, conservation efforts at Angkor Wat brought together teams from France, India, Japan, and China. The German Apsara Conservation Project was formed after a survey found that about 20 percent of the devatas and bas-reliefs were in very poor condition. Natural erosion and earlier restoration attempts had damaged the stone, while microbial biofilms worsened the sandstone decay. Workers repaired collapsed parts of the structure, like the west facade of the upper level, which was buttressed with scaffolding in 2002. A Japanese team restored the north library of the outer enclosure in 2005, and replicas were made to replace lost or damaged sculptures.
In December 2015, a research team from the University of Sydney announced they had discovered a previously unseen group of buried towers built and then destroyed during the construction of Angkor Wat. They also found a large structure with wooden fortifications on the south side, whose purpose remains unknown. The team uncovered evidence of low-density residential areas, a road grid, ponds, and mounds in the region. These findings suggest that the temple precinct, which was once thought to have been used only by the priestly elite, may have served a broader population.
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Angkor Wat stands as a unique blend of the temple mountain design and later concentric gallery plans rooted in Hindu religious beliefs. It served not just as a spiritual site but also as a vital part of the Khmer Empire’s water management system, with its dams and moats connecting to the broader water network and storing water between monsoon and dry seasons. The temple's layout reflects celestial significance: it faces east–west, and sightlines from its terraces align with the solstice sunrise. Its main tower points directly at the spring equinox sun. Representing Mount Meru from Hindu mythology, the structure’s central quincunx of towers symbolizes the five peaks, while its walls and moat reflect surrounding mountain ranges and ocean. Access to higher levels was restricted, with only the laity allowed on the lowest terrace.
Unlike most Khmer temples, Angkor Wat faces west instead of east, which has led scholars like Maurice Glaize and George Coedès to think Suryavarman meant it as his funerary temple. The bas-reliefs move in a counter-clockwise direction—what Hindus call prasavya—again suggesting a funeral context, since rituals during Brahminic burial ceremonies follow this reverse order. Archaeologist Charles Higham points to a container found in the central tower that might have been a funerary jar. Yet Freeman and Jacques note that other Angkor temples also break from the usual eastern alignment, proposing instead that the westward orientation reflects the temple’s dedication to Vishnu, who is linked with the west.
Eleanor Mannikka argues that Angkor Wat was built to represent a new era of peace under King Suryavarman II, with solar and lunar time cycles embedded in its design to reinforce the king’s divine right to rule. She suggests the temple's layout and reliefs were meant to honor and appease heavenly deities. Her theories have met with both curiosity and doubt in academic circles. Mannikka distances herself from more speculative ideas, like those of Graham Hancock, who claims the site reflects the constellation Draco. The oldest surviving plan of Angkor Wat is dated 1715 and was created by Fujiwara Tadayoshi. It is now kept in Japan, at the Suifu Meitoku-kai Shokokan Museum in Mito.
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Angkor Wat stands as the finest example of a distinct architectural style, the Angkor Wat style, which defined classical Khmer design. This style features towers shaped like lotus buds, half-galleries that widen walkways, galleries aligned with enclosures, and terraces laid out in a cross shape along the main axis. Decorative elements include devatas, bas-reliefs, pediments, and intricate garlands depicting narrative scenes. Statuary from this period appears more rigid and less fluid than earlier works. Much of the original design has been lost over time—gilded stucco on towers, gold details on figures in bas-reliefs, and wooden ceilings and doors have all vanished through looting and decay.
Angkor Wat, according to Maurice Glaize, reaches a classic perfection through its restrained monumentality and carefully balanced elements, calling it a work of power, unity, and style. Architect Jacques Dumarçay suggests the temple's layout shows Chinese influence, particularly in how galleries connect at right angles to form courtyards. The axial design of Angkor Wat may stem from Southeast Asian cosmology combined with the mandala structure of the central temple.
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The temple complex is enclosed by an outer wall measuring 1,024 meters by 802 meters and standing 4.5 meters high. Surrounding the wall is a 30-meter open apron and a moat that is 190 meters wide and has a perimeter of over 5 kilometers. The moat stretches 1.5 kilometers from east to west and 1.3 kilometers from north to south. Entry to the site was possible via an earth bank on the eastern side and a sandstone causeway on the western side, which may have replaced an earlier wooden bridge. At each of the cardinal points, there is a gopuram, with the western one being the largest, composed of three towers, now partially ruined. The main enclosure also functioned as a residential area, built on a grid of blocks. These blocks feature mounds and ponds that reflect the layout of a typical Khmer hamlet, with the mounds serving as foundations for homes and the ponds providing water storage for inhabitants.
Under the southern tower of Angkor Wat lies a statue called Ta Reach, once an eight-armed figure of Vishnu that likely stood in the temple’s central shrine. Running between the towers are galleries, and on either side of the main gopura entrance—often called “elephant gates” due to their size—are two additional entrances. These galleries feature square pillars on the outer (west) side and a solid wall on the inner (east) side. The ceiling above the pillars is adorned with lotus rosettes. The west face of the wall displays dancing figures, while the east face consists of windows with balusters decorated with dancing figures, animals, and devatas.
The outer wall surrounds about 203 acres, originally holding not just the temple but also the city and royal palace to its north. Those buildings were made of materials that didn’t last, so now only the shape of streets remains, with most of the area overgrown. A long causeway, 350 meters across, links the western entrance to the temple, featuring naga balustrades and steps on both sides. On each side are libraries, placed at the third set of stairs from the entrance, and ponds between them and the temple. These ponds, along with a cruciform terrace guarded by lions connecting the causeway to the main structure, were added later to the original design.
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The temple rises on a raised platform inside a walled area, built from three rectangular galleries that stack upward, each one taller than the last. The two inner galleries each feature four large towers at their corners—northwest, northeast, southeast, and southwest—around a central, fifth tower. This arrangement is known as a quincunx and is thought to symbolize the mountains of Meru. Since the temple faces west, the design shifts features toward the east, opening up more space on the western sides of each level. Because of this orientation, the steps leading west are shallower than those on the other sides.
Mannikka sees the galleries as representing the king, Brahma, the moon, and Vishnu. The outer gallery measures 187 meters by 215 meters, with pavilions at each corner. It opens to the temple's edge, supported by columned half-galleries. A cruciform cloister called Preah Poan connects this outer space to the second enclosure on the west side. Pilgrims left Buddha images there over time, though most have since been removed. This area holds many inscriptions about pilgrim good deeds—mostly in Khmer, but also in Burmese and Japanese. The four small courtyards marked by the cloister may have originally held water. North and south of the cloister stand libraries.
Beyond the first galleries, a second, inner structure rises, linked by another cruciform terrace—again a later addition—to two libraries flanking it. From this level upward, devata images appear frequently on the walls, alone or grouped in pairs or fours. The second-level enclosure measures 100 meters by 115 meters and may have been flooded originally to symbolize the ocean surrounding Mount Meru. Three staircases on each side lead up to the corner towers and gopuras of the inner gallery. These steep paths may represent the challenge of reaching the divine realm. This inner space, known as the Bakan, is a square measuring 60 meters on each side, with axial galleries connecting each gopura to the central shrine and smaller shrines beneath the corner towers.
The galleries’ roofs feature snake motifs ending in lion or garuda heads. Carved lintels and pediments adorn the entrances to the galleries and shrines. The central tower rises 43 meters, standing 65 meters above the ground, elevated above the surrounding four towers. Originally home to a Vishnu statue and open on all sides, the shrine was walled in during the temple’s conversion to Theravada Buddhism, with new walls displaying standing Buddhas. In 1934, conservator George Trouvé excavated the pit beneath the central shrine; though already robbed, he found a sacred foundation deposit of gold leaf two meters above ground level.
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Angkor Wat’s fame comes in part from its rich decoration, especially the bas-relief friezes built right into the architecture. The inner walls of the outer gallery feature large scenes mostly from the Hindu epics the Ramayana and the Mahabharata. Moving anti-clockwise from the north-west corner, the western gallery shows Rama defeating Ravana in the Battle of Lanka, and the Kurukshetra War where the Kaurava and Pandava armies destroy each other. On the southern wall, a single historical scene portrays a procession of Suryavarman II, along with the 32 hells and 37 heavens of Hindu belief. Higham has called these "the greatest known linear arrangement of stone carving."
On the eastern gallery, a widely admired scene depicts the Churning of the Sea of Milk, illustrating 92 asuras and 88 devas working with the serpent Vasuki to churn the ocean under Vishnu's guidance. Mannikka notes only 91 asuras and suggests the uneven numbers reflect the days between the winter solstice and spring equinox, and then from equinox to summer solstice. This is followed by reliefs showing Vishnu overcoming asuras, a section added in the 16th century. The northern gallery presents Krishna's triumph over Bana.
Angkor Wat is adorned with more than 1,796 images of devatas and apsaras, according to documented research. Architects placed small apsara figures—about twelve to sixteen inches—on pillars and walls as decorative details. Larger full-body devata images, around thirty-seven to forty-three inches, were positioned more prominently throughout the temple, from the entrance to the highest towers. In 1927, Sappho Marchal published a study that highlighted the rich variety in their hair, jewelry, clothing, and poses, concluding these depictions reflected real practices from the Angkor period.
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By the 12th century, Khmer architects had mastered the use of sandstone over brick or laterite, with graywacke— a durable sandstone often found near water— being a key material. Recent LIDAR scans revealed the temple was built on around 3 million cubic meters of fill. Most visible parts are constructed from Kulen sandstone blocks, while laterite served the outer wall and internal structural elements. The method of binding the blocks remains unidentified, though natural resins or slaked lime have been proposed. Builders focused carefully on bedding plane orientation for structural strength. The monument required between five and ten million sandstone blocks, each weighing as much as 1.5 tons, quarried from Mount Kulen, about 40 kilometers away.
A proposed route would have stretched 35 kilometers along a canal toward Tonlé Sap lake, another 35 crossing the lake, and then 15 kilometers against the Siem Reap River, totaling 90 kilometers. But in 2011, Etsuo Uchida and Ichita Shimoda from Waseda University in Tokyo identified a shorter 35-kilometer waterway linking Mount Kulen to Angkor Wat, using satellite images to suggest that the Khmer may have used this path instead. Radiocarbon dating shows that during the site’s occupation, it was regularly maintained, with wooden elements being replaced over time.
The surfaces, columns, lintels, and roofs of Angkor Wat feature detailed carvings drawn from Indian literature—unicorns, griffins, winged dragons pulling chariots, and figures of dancers with intricate hairstyles. Scenes also include soldiers, elephants, and celestial beings. The gallery wall alone contains almost 1,000 square meters of bas-reliefs. Some walls have holes that suggest they were once covered in bronze sheets, valued in ancient times and often looted. Building this structure required a massive workforce, likely in the thousands, including skilled artisans. These carving techniques had been refined centuries earlier, as evidenced by artifacts dated to the seventh century, well before the Khmer came to power.
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During the spring and autumn equinoxes, the rising sun lines up with the central tower of Angkor Wat when seen from the western entrance causeway. Several studies have noted this phenomenon, and while scholars interpret it differently, most agree the alignment was deliberate. It suggests that the temple’s design took astronomical considerations into account, reflecting a deep connection between the structure and celestial events.
In later Buddhist interpretations, Angkor Wat came to be seen as a symbolic representation of the universe, with its central towers and concentric galleries standing for Mount Meru, the sacred axis found in both Hindu and Buddhist thought. The moat and wall were understood as the boundary between earthly life and the divine realm. As visitors moved toward the center, the towers grew taller, symbolizing the spiritual climb toward the gods. This reinterpretation helped keep Angkor Wat active as a place of worship long after the Khmer empire declined, setting it apart from many other sites in the region that were left behind.
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Because millions of people visit Angkor Wat every year, it has come to represent Cambodia itself. The temple complex is so closely linked with the country that it appears on the national flag. That depiction has been part of the flag since its first version was introduced in 1863.
The temple of Angkor Wat did not naturally become a symbol of national pride; instead, it was drawn into a wider political and cultural effort tied to French colonial rule in Cambodia, which was part of French Indochina. A pavilion representing the French protectorate of Cambodia brought attention to the site when it displayed a life-size replica of Angkor Wat at various exhibitions in Europe. This display took place between 1889 and 1937, shown in Paris and Marseille. The replica was exhibited in the plaster cast museum of Louis Delaporte, known as musée Indo-chinois, which stood in the Trocadero Palace in Paris from around 1880 until the mid-1920s.
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Myths about Angkor Wat developed as Buddhist traditions took hold in Cambodia over many centuries. By the 16th and 17th centuries, Theravada Buddhism had become the main religion in the area. This shift changed how people understood the monument, moving it away from its original Hindu roots into a sacred Buddhist space. Local stories began to reframe the temple’s meaning, linking it to Buddhist ideas about the cosmos. These new narratives shaped how people saw Angkor Wat, transforming its purpose and significance through the lens of the faith that had grown strong in the region.
In the 17th century, Japanese travelers in Southeast Asia recognized Angkor Wat as Jetavana, a sacred site from ancient Magadha in what is now India, where the Buddha was said to have lived. These pilgrims saw it as a Buddhist holy place, and their inscriptions and maps show this understanding. Some accounts even describe the Buddha himself visiting or living there. This view connected Angkor Wat to wider traditions of pilgrimage and helped shape mythic stories around the site that emphasized its spiritual importance.
Local Cambodian traditions reimagined Angkor Wat through Buddhist stories, seeing it as a place for spiritual growth and connection to the divine. The temple was thought of as a path between human and godly worlds, a site for meditation and earning merit. Some tales even claimed that the detailed carvings on the walls held secret Buddhist meanings, even though they showed stories from Hindu mythology. These ideas helped shape how people viewed Angkor Wat—not just as a building linked to one faith, but as a sacred space for everyone.
By the 18th and 19th centuries, evidence shows a continuous Buddhist monastic presence at Angkor Wat. During this time, shrines were established, Buddha images were carved, and ritual activities took place at the site. Myths from that period depict the temple as an active monastery, protected by spiritual beings like nāgas and devas.
Modern scholarship shows that the religious change at Angkor Wat happened slowly, over many years, with the site being adapted little by little to support new practices. The transformation involved both physical changes to the structure and shifts in how rituals were performed. These changes point to a deep and lasting impact of Buddhist beliefs and stories on the way people understood and used the monument. The influence of Buddhism shaped not just what was done there, but also how the place itself came to be seen and interpreted.
Buddhism has played a major role in how people understand Angkor Wat, both in everyday life and among scholars. The site is seen as a powerful symbol of Cambodia’s Buddhist roots and remains central to its modern cultural and religious sense of self.
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Since the 1990s, Angkor Wat has drawn growing crowds of tourists. In 1993, just 7,650 visitors came to the site. By 2004, that number had jumped to 561,000 foreign tourists in Siem Reap province alone, about half of all foreign visitors in Cambodia. The figure surpassed one million in 2007 and reached over two million by 2012. In 2013, Angkor Wat welcomed over two million foreign tourists, and by 2018 that number rose to 2.6 million.
The site was managed by SOKIMEX from 1990 until 2016, a company that rented it from the Cambodian government. As more tourists visited, damage began to occur—like graffiti on the walls. To help protect the bas-reliefs, ropes were put in place, and wooden steps were added to preserve the floors. Tourism also brought in some extra money for upkeep; by 2000, about 28% of ticket income across the whole Angkor area went toward temple maintenance. Still, most of the actual work was done by teams funded by foreign governments rather than local authorities.
Since Angkor Wat has seen a big increase in tourists over the years, UNESCO and its International Co-ordinating Committee for the Safeguarding and Development of the Historic Site of Angkor, known as the ICC, worked with officials from the Royal Government and APSARA to hold meetings about what’s called "cultural tourism." They focused on offering top-notch places to stay and services for visitors, while also making sure Cambodia benefits economically. The goal was to protect and share the country's rich culture. In 2001, this effort led to the idea of building an “Angkor Tourist City,” designed in traditional Khmer style, with spaces for leisure and tourism, and fancy hotels that could host many travelers.
Developing large tourist projects at Angkor Wat has raised concerns from APSARA and the ICC, who say past developments ignored building rules and could harm the landscape. These new plans also threaten the local water, sewage, and electricity systems in Siem Reap. The high volume of tourists has affected the underground water table, which is now putting stress on the temple structures. Locals worry that the town’s character is being lost to cater to tourism. At the ASEAN Tourism Forum in 2012, it was decided that Borobudur and Angkor Wat would become sister sites and provinces.
In 2020, the COVID-19 pandemic brought global travel to a halt, hitting Cambodia’s tourism industry hard and leaving Angkor Wat nearly empty. The site reopened to international visitors late in 2021, but by the end of 2022, only 280,000 tourists had visited—far fewer than the 2.6 million who came in 2018. Things improved in 2023, with over 400,000 visitors by late July. In mid-2024, some tourists reenacted scenes from the Temple Run game series for social media, drawing criticism from conservationists who warned that such actions could damage the ancient structures and were culturally disrespectful. The heavy tourism at this important site has become increasingly debated, with some even calling for Angkor Wat to close as a tourist attraction, due to concerns about how its World Heritage status affects local communities and their heritage.
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