At its peak in the 12th century, the Khmer Empire ruled over most of mainland Southeast Asia and Angkor was home to nearly one million people — larger than any European city of the era.
1,000+
Temples
802–1431
AD
6
Centuries
Angkor Wat — 12th century
The temples of Angkor are not merely ancient ruins — they are the monumental legacy of a civilisation that dominated Southeast Asia for over six centuries. Between 802 and 1431 AD, the Khmer Empire built more than a thousand temples across an area larger than modern-day Paris, creating what archaeologists now consider the largest pre-industrial city in human history. Walking through the corridors of Angkor Wat at dawn, or standing beneath the 216 stone faces of Bayon, you are not just visiting a tourist attraction — you are stepping into a world that once rivalled the Roman Empire in scale and ambition. This is the story of how that world was built, why it fell, and how it was rediscovered.
This guide traces the complete arc of Angkor's history: from the founding of the Khmer Empire by Jayavarman II on the sacred mountain of Phnom Kulen, through the golden age of Suryavarman II and Jayavarman VII, to the mysterious decline and abandonment of the city in the 15th century. We explore the religious transformations, the engineering marvels, the great kings, and the unsolved mysteries that continue to fascinate historians and archaeologists today. Every fact in this article has been cross-referenced with scholarly sources and enriched by years of living beside these temples in Siem Reap.
Timeline: 802–1431 AD
The history of Angkor spans more than six centuries, from the consecration of Jayavarman II as universal monarch (chakravartin) on Phnom Kulen in 802 AD to the sacking of Angkor by the Siamese kingdom of Ayutthaya in 1431. In 802, Jayavarman II declared independence from the Javanese overlords who had dominated the Khmer lands and established the Khmer Empire with its capital near present-day Siem Reap. The devaraja ritual he performed on Phnom Kulen — consecrating him as a god-king and breaking the spiritual link with Java — became the founding act of an empire that would endure for six hundred years.
By the 9th century, his successors began building the first major temple complexes at Roluos, including Bakong, Preah Ko, and Lolei, establishing the architectural vocabulary — the tower-sanctuary, the enclosure wall, the axial causeway — that would define Khmer art for generations. Yasovarman I moved the capital to Angkor around 889 and constructed the East Baray, a massive reservoir measuring 7.5 by 1.8 kilometres that could store over 53 million cubic metres of water, sustaining rice paddies across the flood plain. He also built hermitages on every major hilltop in the region and founded the first Angkor temple, Phnom Bakheng, atop the natural hill that still dominates the landscape today.
The 10th century saw intense dynastic rivalry and the construction of Pre Rup and East Mebon under Rajendravarman II, who also built Banteay Srei, considered the jewel of Khmer decorative sculpture for its extraordinary fineness of carving in pink sandstone. Suryavarman I expanded the empire westward into present-day Thailand and built the West Baray in the early 11th century. Udayadityavarman II added the Baphuon — then the tallest temple in the empire — and the West Mebon.
The greatest construction period came under Suryavarman II (1113–1150), who built Angkor Wat, and Jayavarman VII (1181–1218), who erected Angkor Thom, the Bayon, Ta Prohm, and Preah Khan within a single reign — an output of stone that has no parallel in premodern Asia. After Jayavarman VII's death around 1218, the empire entered a slow decline marked by religious conflict, environmental stress, and sustained military pressure from the rising Thai kingdoms. By 1431, Angkor was largely abandoned as the royal court shifted south to the area of modern Phnom Penh, closer to the maritime trade routes that were reshaping the economy of Southeast Asia.
The Great Kings of Angkor
Three kings stand above all others in the history of Angkor. Jayavarman II (802–835) founded the empire and introduced the devaraja cult — the concept of the god-king — which would define Khmer kingship for centuries. He unified the warring Khmer principalities scattered across the Mekong basin and established the sacred bond between the king, the gods, and the land.
By performing the devaraja ritual on Phnom Kulen with the Brahmin priest Sivakaivalya, he declared himself the earthly incarnation of Shiva, a theological claim that legitimised his authority over all Khmer peoples and set the pattern of divine kingship that would define the empire for four centuries. His successors — Jayavarman III, Indravarman I, and Yasovarman I — each added temples, barays, and hydraulic infrastructure that grew the capital into the most sophisticated agrarian city of the premodern world. Suryavarman II (1113–1150) was the builder-king who commissioned Angkor Wat, the largest religious monument ever constructed by any civilisation.
Dedicated to Vishnu and aligned with astronomical precision, Angkor Wat took an estimated 30 years to build and employed tens of thousands of artisans, stone carvers, and labourers sourced from across the empire. Suryavarman II also expanded the empire to its greatest territorial extent, waging wars against the Cham kingdom of Champa to the east, the Dai Viet to the north, and the Mon kingdoms to the west. His naval campaigns on the Tonle Sap and Mekong rivers demonstrated a military reach few contemporaries could match.
Jayavarman VII (1181–1218) is considered the greatest Khmer king by most historians, and certainly the most prolific builder in Khmer history. After the Cham sacked and occupied Angkor in 1177 — a humiliation without precedent in the empire's four-century history — he drove them out following a decisive naval battle on the Tonle Sap in 1181. He then rebuilt the empire on an unprecedented scale, constructing Angkor Thom, a walled royal city of 9 square kilometres enclosed by an 8-metre wall and a 100-metre moat; the Bayon with its 216 enigmatic stone faces; Ta Prohm and Preah Khan as vast monastic universities housing thousands of monks and scholars; and a network of 102 hospitals across the empire.
Unlike his predecessors, he was a devout Mahayana Buddhist, and his entire building program — from the compassionate faces of the Bayon to the healing temples of the hospital network — reflected Buddhist ideals of universal compassion and the duty of the sovereign to relieve suffering.
Angkor Wat: A Deep Dive
Angkor Wat is not just a temple — it is a microcosm of the Hindu universe rendered in sandstone, and the most ambitious single building project in human history. Built by Suryavarman II between approximately 1113 and 1150, it is dedicated to Vishnu and oriented to the west, which is unique among Khmer temples and has led scholars to debate whether it served as a funerary temple for the king. The west is associated with death and the setting sun in Hindu cosmology, and the internal bas-relief programme also reads counter-clockwise — the direction of funerary ritual.
The temple covers 162.6 hectares, making it the largest religious monument on Earth, a record it still holds today. The central tower rises 65 metres and represents Mount Meru, the cosmic mountain at the centre of Hindu and Buddhist cosmology, the home of the gods. The five towers, arranged in a quincunx, symbolise the five peaks of Mount Meru, with the tallest central spire representing the summit where Vishnu dwells.
The surrounding moat, 190 metres wide and nearly 5 kilometres in total circuit, represents the cosmic ocean that surrounds the mountain of the gods. A 250-metre causeway of sandstone, flanked by stone nagas, crosses the moat and leads the worshipper through a cruciform entrance gallery before the inner temple reveals itself — an architectural procession designed to simulate the journey of the soul toward the divine. The 800-metre gallery of bas-reliefs is perhaps the greatest narrative sculptural programme surviving from the ancient world: it depicts scenes from the Ramayana, the Mahabharata, historical battle scenes involving Suryavarman II and his armies, and the cosmic event of the Churning of the Sea of Milk, in which gods and demons cooperate to extract the elixir of immortality from the primordial ocean.
The total carved surface covers over 1,000 square metres and required the coordinated work of hundreds of master carvers over several decades. The apsara devata — celestial female figures — appear in over 1,796 individual carvings across the temple walls, each with a unique facial expression, hairstyle, or gesture. Recent LIDAR surveys conducted by the Greater Angkor Project have revealed that Angkor Wat was surrounded by a vast, precisely planned urban grid with residential mounds, roads, canals, ponds, and market areas extending across dozens of square kilometres — a city of perhaps 500,000 people that remained invisible for centuries beneath the jungle canopy, detectable only from the air.
Temple Hospitals of the Khmer Empire
One of the most remarkable but least known aspects of the Khmer Empire was its systematic network of state hospitals — the first such public health infrastructure in Southeast Asian history. Jayavarman VII, a devout Mahayana Buddhist who believed that the suffering of his subjects was his own suffering, established 102 hospitals (arogyasala) across the empire between 1181 and 1218. Each hospital was a standardised small temple complex built to an identical plan: a central sanctuary housing the image of Bhaisajyaguru, the Medicine Buddha; a surrounding laterite wall; a dharmasala (resting hall) for patients; and a pond for ritual purification and hygienic bathing.
The standardisation itself was remarkable — it suggests a centralised health administration capable of designing, funding, staffing, and resupplying facilities across a territory spanning modern Cambodia, Thailand, Laos, and parts of Vietnam. Inscriptions at Ta Prohm and Preah Khan record that these hospitals employed a staff of 80 to 100 people each, including physicians trained in Ayurvedic medicine, nurses, cooks, attendants, and specialists responsible for sourcing, preparing, and dispensing medicines from the imperial pharmacopoeia. The hospitals were explicitly open to all people regardless of caste, social status, or origin — a radical egalitarianism for the 12th century that prefigured modern concepts of universal healthcare by eight hundred years.
The pharmacopoeia recorded in surviving inscriptions included camphor, cardamom, ginger, honey, sesame oil, and dozens of other medicinal herbs and minerals sourced from across the empire's vast territory. Each hospital received regular supplies — recorded in meticulous detail in stone inscriptions — from designated villages across the empire, creating a logistics network that was itself an extraordinary feat of administration. Neak Poan, the jewel-like island temple set at the centre of Jayavarman VII's Preah Khan baray, is widely interpreted by scholars as a spiritual healing complex where sacred water, believed to embody the healing properties of the mythical lake Anavatapta in the Himalayas, flowed through four carved horse, elephant, lion, and human gargoyles into subsidiary pools.
Pilgrims came from across the empire seeking cures for ailments ranging from fever and skin disease to mental illness and infertility, making Neak Poan both the physical and spiritual heart of the Khmer healing world. The scale of this infrastructure — 102 standardised facilities operated simultaneously across an empire of perhaps 1 million square kilometres — has no parallel anywhere in the medieval world and stands as compelling evidence that the Khmer Empire combined military power and architectural ambition with a genuine commitment to the welfare of its people.
From Hindu to Buddhist: The Religious Shift
The Khmer Empire underwent one of the most dramatic religious transformations in Asian history, cycling through three distinct state religions across six centuries. The early kings — from Jayavarman II in the 9th century through Suryavarman II in the 12th — were Hindus, primarily Shaivites who worshipped Shiva, though Vaishnavism enjoyed royal patronage under Suryavarman II, who dedicated Angkor Wat to Vishnu. Their temples were designed as earthly representations of Mount Meru, the cosmic mountain at the centre of the Hindu universe, and the kings themselves were considered living incarnations of deities through the devaraja cult — a concept that fused Brahmanical ritual, Indian kingship theory, and indigenous Khmer ancestor veneration into a uniquely Cambodian theological system.
The temple-mountain form, with its towering central prasat and concentric enclosure walls replicating the rings of mountains and oceans surrounding Meru, was the direct architectural expression of this theology. The great turning point came with Jayavarman VII in the late 12th century. Having witnessed the catastrophic Cham invasion of 1177 — in which Angkor was sacked, occupied for four years, and King Tribhuvanadityavarman killed — he emerged as both military deliverer and religious reformer, embracing Mahayana Buddhism and reshaping the empire's spiritual identity from the ground up.
The 216 serene faces of the Bayon are widely interpreted as Avalokiteshvara, the Bodhisattva of compassion, superimposed with the features of the king himself — an image of royal compassion radiating in all four cardinal directions. After Jayavarman VII's death, there was a violent Hindu reaction under Jayavarman VIII (1243–1295), who systematically defaced thousands of Buddhist images across the empire and restored Shaivite worship to official prominence — an ideological reversal still visible today in the chiselled-out Buddhas at Bayon, Preah Khan, and Banteay Kdei. Then, in the 13th and 14th centuries, Theravada Buddhism — carried to the Khmer court by monks from Sri Lanka via the Thai kingdoms of Sukhothai and Ayutthaya — gradually and peacefully displaced both Hinduism and Mahayana Buddhism.
This final shift fundamentally restructured Khmer society: the elaborate temple-building tradition ceased, the god-king concept was abandoned in favour of the monk-king ideal, and spiritual energy redirected from monumental stone architecture to wooden monasteries and individual merit-making through alms-giving, the release of animals, and the sponsorship of monks — practices that define Cambodian Buddhism to this day.
The Fall of the Khmer Empire
The decline of the Khmer Empire was not a sudden collapse but a gradual erosion that unfolded over two centuries, driven by the interaction of forces that no single king could have reversed alone. Historians have identified multiple contributing factors, each amplifying the others. First, the massive building programs of Jayavarman VII may have pushed the empire's resources and manpower beyond sustainable limits.
The construction of Angkor Thom, the Bayon, Ta Prohm, Preah Khan, and over a hundred other structures within a single reign required sandstone quarried from Phnom Kulen, 50 kilometres away, cut into blocks averaging 1.5 tonnes each, and transported by a canal network of extraordinary complexity. Inscriptions at Ta Prohm record that the temple alone required the permanent labour of 79,365 people drawn from 3,140 villages, consuming resources on a scale that may have strained the empire's capacity to sustain both construction and agriculture simultaneously. Second, environmental degradation played a critical and increasingly well-documented role.
Groundbreaking research using airborne LIDAR combined with sediment core analysis from lake beds across the Angkor region has shown that progressive deforestation of the Kulen plateau — the source of the rivers that fed the barays — combined with the over-engineering and silting of the canal network led to catastrophic monsoon flooding events and critical dry-season water shortages. By the 14th century, the sophisticated hydraulic system that had made Angkor the rice bowl of Southeast Asia, capable of producing three harvests per year, had been fatally compromised by siltation and structural failure across key diversion channels. Third, the rise of the Thai kingdoms — first Sukhothai in the 13th century, then the more powerful Ayutthaya — put sustained military pressure on the western frontier, raiding deep into Khmer territory and draining both military manpower and economic resources.
Ayutthaya sacked Angkor in 1351 and occupied it again following the siege of 1431, after which the Khmer court definitively abandoned the city and relocated to the area around Phnom Penh, better positioned for the riverine and maritime trade that was reshaping the economies of Southeast Asia. Some historians additionally point to the ideological disruption caused by the spread of Theravada Buddhism, which challenged the centralised god-king system that had justified the enormous collective labour mobilisation on which the empire depended, and to epidemic disease — possibly plague or cholera — that may have caused significant demographic collapse in the region during the 14th and early 15th centuries.
Rediscovery by the West
Although Angkor was never truly forgotten by the Khmer people — monks maintained Angkor Wat as a functioning Buddhist shrine throughout the centuries of political decline, and the temple continued to attract pilgrims from across Southeast Asia — it was the French naturalist Henri Mouhot who first brought the temples to sustained Western attention. Arriving in Cambodia in 1860 as part of a natural history expedition, Mouhot spent several weeks documenting the temples with remarkable precision, producing vivid written descriptions and pen-and-ink sketches that were published in Le Tour du Monde in 1863 and translated into English the same year. European readers were electrified.
Yet the popular narrative of Mouhot as the lone discoverer is a myth the historical record does not support. Portuguese missionaries and merchants had visited and written about Angkor as early as the 1550s. A Spanish friar, Marcelo de Ribadeneyra, published a detailed description in 1601.
A Japanese Buddhist pilgrim named Kenryo Shimano drew a remarkably accurate floor plan of Angkor Wat around 1632, mistaking it for the sacred Indian grove of Jetavana where the Buddha had taught. A Cambodian monk's manuscript describing the temples was acquired by the Bibliotheque nationale de France long before Mouhot arrived. What Mouhot contributed was not discovery but eloquent advocacy: his lyrical prose and dramatic sketches reached a European public hungry for tales of lost civilisations, and his articles — published posthumously after he died of fever in Laos in 1861 — transformed Angkor from an obscure colonial curiosity into a cultural sensation.
After Mouhot's accounts triggered sustained European fascination, the French colonial administration moved quickly. The Ecole Francaise d'Extreme-Orient established a permanent research station at Angkor in 1901 and launched systematic archaeological surveys that catalogued hundreds of temples across Cambodia and produced the corpus of epigraphic translations that remain foundational today. The EFEO pioneered the technique of anastylosis — carefully dismantling collapsed structures stone by stone, cataloguing each block's position, and reassembling them correctly — applied most famously at Banteay Srei in the 1930s and at the Baphuon, a project interrupted by war and resumed over four decades.
The 20th century brought extreme turbulence: the Khmer Rouge used Angkor Wat's silhouette as a propaganda symbol while simultaneously looting temple sites and destroying EFEO records. In 1992, UNESCO inscribed the entire Angkor Archaeological Park as a World Heritage Site, catalysing an international rescue effort that engaged more than 20 nations.
Unsolved Mysteries of Angkor
Despite more than a century of dedicated research by archaeologists, epigraphers, art historians, and hydrologists from dozens of countries, Angkor still holds mysteries that resist resolution. The first and most debated is the westward orientation of Angkor Wat. Virtually every other major Khmer temple faces east — toward the rising sun and new beginnings.
Angkor Wat faces west, toward the setting sun and, in Hindu cosmology, toward the realm of the dead. Some scholars argue this confirms it was built as a funerary monument for Suryavarman II, pointing also to the counter-clockwise direction of its bas-relief narrative — the ritual direction for Khmer funeral rites. Others argue the orientation was chosen for astronomical alignments: at the spring equinox, the sun rises precisely over the central tower when viewed from the main causeway.
The debate remains open. The second great mystery is the identity of the Bayon faces. The 216 enormous stone faces that gaze serenely outward from the 54 towers of the Bayon have been attributed by various scholars to Avalokiteshvara the Bodhisattva of compassion, to the four-faced god Brahma, to Jayavarman VII himself depicted as a bodhisattva-king, or to some deliberate theological fusion of all three identities into a single image of divine sovereignty.
No inscription names them definitively, and the debate has occupied Khmer scholars for over a century. A third mystery concerns the true scale and maximum population of Angkor. Before the LIDAR revolution, scholars estimated the population at 200,000 to 300,000 people.
Airborne LIDAR surveys conducted from 2012 onward by the Greater Angkor Project revealed a continuous low-density urban landscape of up to 1,000 square kilometres — roughly the size of Los Angeles — connected by roads, earthen embankments, hydraulic infrastructure, and a grid of ponds that served as household water storage. At its peak, some researchers now estimate Angkor may have housed close to one million people, making it plausibly the largest premodern city on Earth. A fourth unsolved problem is why the hydraulic system failed.
LIDAR and sediment analysis show the system was repeatedly modified over centuries, but whether its ultimate failure was caused by mismanagement, extreme monsoon events associated with climate shifts, or structural problems from overextension remains unresolved. Dozens of minor temples across the Angkor region have never been systematically excavated, and hundreds of Sanskrit and Old Khmer inscriptions carved on stele and temple doorways remain only partially translated — a reminder that significant revelations about the Khmer Empire still await future scholars.
UNESCO World Heritage: 1992 to Today
Angkor was inscribed as a UNESCO World Heritage Site in 1992, at a critical juncture when Cambodia was emerging from two decades of devastating conflict and the temples faced existential threats from organised looting, uncontrolled encroachment, vegetation damage, and years of neglected structural maintenance. The inscription immediately placed Angkor on the List of World Heritage in Danger, a designation that, far from being a mark of shame, served as a catalyst for one of the largest international conservation mobilisations in history. The International Coordinating Committee for the Safeguarding and Development of the Historic Site of Angkor (ICC-Angkor) was established in 1993 under the co-chairmanship of France and Japan, providing a multilateral governance structure that brought together donor nations, UNESCO, and the Cambodian government in a formal coordination framework.
The results over subsequent decades have been extraordinary. Japan funded the comprehensive restoration of the Bayon and the North Library of Angkor Wat, employing teams of Japanese and Cambodian specialists over more than a decade. France continued the EFEO's historic work on the Baphuon, a project interrupted by the civil war and resumed in conditions of exceptional difficulty because all the disassembly documentation had been destroyed by the Khmer Rouge.
India's Archaeological Survey of India took responsibility for Ta Prohm. Germany worked on the Terrace of the Elephants. China has been restoring Chau Say Tevoda.
The United States, through the World Monuments Fund, contributed to Preah Khan and other sites. In 2004, Angkor was removed from the Danger List in recognition of Cambodia's measurable progress in site management and conservation. Today, the APSARA National Authority manages the 400-square-kilometre Angkor Archaeological Park, balancing the competing demands of conservation science, heritage interpretation, and a visitor flow that exceeded 2.6 million people before the pandemic.
New threats require ongoing vigilance: groundwater depletion caused by the rapid proliferation of hotels and guesthouses in Siem Reap — which drew water from the aquifer at rates far exceeding natural recharge — has destabilised foundations across multiple temple zones, leading the Cambodian government to ban new hotel construction within certain radii of the park. Rising temperatures combined with more intense monsoons are accelerating the biochemical deterioration of the sandstone carvings, as biological crusts of algae, lichen, and microorganisms expand their colonisation of carved surfaces. Tourism management remains a central challenge: the concentration of 80 percent of visitors at a handful of major sites — Angkor Wat, Bayon, Ta Prohm — creates extreme pressure on those monuments while dozens of equally significant temples see almost no visitors.
APSARA and its international partners are actively working on visitor dispersal strategies, with new interpretive infrastructure planned for lesser-known sites across the 400-square-kilometre park. Despite these pressures, the conservation achievement at Angkor since 1992 represents one of the most successful applications of international heritage cooperation in the post-war world, demonstrating that diplomatic collaboration and technical expertise can preserve places of universal value for future generations.
The Living Legacy of Angkor
Angkor is not a dead city — it is a living symbol of Khmer identity that permeates every dimension of modern Cambodian culture, from state symbols to daily spiritual practice. The silhouette of Angkor Wat appears on the national flag — the only national flag in the world to depict a building — as well as on the riel banknote, the national beer label, and countless commercial logos. This ubiquity is not accidental: Angkor is the foundational proof of Cambodian civilisational greatness, a counterpoint to the trauma of the 20th century that every Cambodian carries with them.
Classical Apsara dance, which traces its origins to the devata and apsara figures carved with extraordinary delicacy on the temple walls of Angkor Wat and Banteay Srei, was nearly exterminated by the Khmer Rouge, who killed an estimated 90 percent of Cambodia's professional performing artists between 1975 and 1979. The art form was revived after liberation by a generation of survivors who had kept their knowledge hidden, and it was officially recognised as a UNESCO Intangible Cultural Heritage in 2003. Today it is performed nightly in Siem Reap restaurants and cultural centres, keeping alive a performance tradition more than a thousand years old and providing a living economic lifeline for hundreds of Cambodian performers and choreographers.
The Khmer language and its script — demonstrably the oldest continuously used writing system in Southeast Asia, predating Thai and Lao scripts by centuries — evolved directly from the Sanskrit-influenced Old Khmer inscribed on temple doorways and stelae across the empire. Modern Cambodian Buddhism retains unmistakable traces of the Hindu-Buddhist syncretism of the Angkorian period: nagas guard pagoda staircases, Vishnu appears alongside the Buddha in temple iconography, the twelve-animal zodiac in use today was inherited from the Angkorian court calendar, and the Khmer New Year festival preserves cosmological symbolism rooted in the Brahmanical worldview of the empire. For the people of Siem Reap, the temples are not tourist attractions but living sacred spaces where families arrive before dawn to make offerings of jasmine and lotus, where orange-robed monks chant in the same galleries that once rang with Sanskrit hymns, and where Cambodians celebrate Pchum Ben — the fifteen-day festival of the ancestors — by bringing food to temple gates for souls in the spirit world, a practice unbroken across the centuries.
Living near these temples over time, you come to understand that Angkor is not past tense. It is a present continuously renewed by the people who inhabit its shadow and carry its meaning forward.
Frequently Asked Questions
When was Angkor built?
The Khmer Empire founded Angkor in 802 AD when Jayavarman II declared himself universal monarch on Phnom Kulen. Construction of major temples continued until the early 13th century. The city was largely abandoned by 1431.
Who built Angkor Wat?
King Suryavarman II commissioned Angkor Wat between approximately 1113 and 1150 AD. It was originally a Hindu temple dedicated to Vishnu and later converted to Buddhist use.
Why was Angkor abandoned?
Angkor was abandoned due to a combination of factors: environmental degradation of the water system, exhaustion from massive building programs, military pressure from the Thai kingdom of Ayutthaya, the shift to Theravada Buddhism, and possibly plague. The Siamese sacked Angkor in 1431.
How many temples are in Angkor?
There are more than 1,000 temples and structures in the Angkor Archaeological Park, which covers over 400 square kilometres. Only a fraction are open to visitors, with about 30 major temples commonly visited.
Is Angkor Wat Hindu or Buddhist?
Angkor Wat was originally built as a Hindu temple dedicated to Vishnu in the 12th century. It was gradually converted to Theravada Buddhist use in the 13th–14th centuries, which it remains today.
What do the faces on Bayon represent?
The 216 stone faces on the 54 towers of Bayon are believed to represent Avalokiteshvara, the Bodhisattva of compassion, possibly combined with the likeness of King Jayavarman VII. Scholars continue to debate the exact meaning.
Who was Jayavarman VII?
Jayavarman VII (reigned 1181–1218) is considered the greatest Khmer king. A devout Buddhist, he rebuilt the empire after the Cham invasion of 1177, constructed Angkor Thom, Bayon, Ta Prohm, Preah Khan, and established 102 hospitals across the empire.
How was Angkor rediscovered?
Angkor was never truly lost to the Khmer people. The French naturalist Henri Mouhot brought it to Western attention in 1860 with his published sketches and accounts. Portuguese missionaries had visited as early as the 16th century.
When did Angkor become a UNESCO site?
Angkor was inscribed as a UNESCO World Heritage Site in 1992. It was initially placed on the Danger List but was removed in 2004 after significant conservation progress by the international community.
How big was the Khmer Empire?
At its peak under Jayavarman VII in the late 12th century, the Khmer Empire controlled most of mainland Southeast Asia, including modern-day Cambodia, Thailand, Laos, and southern Vietnam. Angkor itself may have housed up to one million people.
Why is Angkor Wat on the Cambodian flag?
Angkor Wat has appeared on the Cambodian flag since 1850, making it the only building on any national flag in the world. It symbolises Khmer identity, civilisational achievement, and national pride.
What happened to Angkor during the Khmer Rouge?
During the Khmer Rouge regime (1975–1979), Angkor was used as propaganda but also suffered looting and neglect. Some temples were damaged and statues were decapitated or stolen. International conservation efforts after 1992 have helped repair much of this damage.
What is the baray water system?
The barays were enormous man-made reservoirs built to store monsoon water for dry-season irrigation. The West Baray measures 8 by 2.3 kilometres and still holds water today. This hydraulic system was the foundation of Angkor's agricultural productivity and urban population.
Can you visit all 1,000 temples?
No. Most of the 1,000+ structures are unrestored ruins deep in the jungle. The standard Angkor Pass covers approximately 30 major temples in the park. Remote sites like Beng Mealea and Koh Ker require separate access or are included in the pass depending on the ticket type.
What has LIDAR revealed about Angkor?
LIDAR surveys conducted since 2012 have revealed that Angkor was far larger than previously thought — a sprawling low-density urban landscape of up to 1,000 square kilometres with roads, canals, ponds, and residential areas hidden beneath jungle canopy. This has fundamentally changed our understanding of the Khmer Empire.
About the author
Stephane Jambu has lived in Siem Reap for years and has explored the temples of Angkor in every season and at every hour. From pre-dawn sunrise sessions to rainy-season solitude at Beng Mealea, his guides are based on hundreds of personal visits and a deep engagement with Khmer history and culture.