Sukhothai

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In the upper basin of the Chao Phraya, where the rivers of the central plain gather out of the northern hills, the great laterite face of Angkor had long pressed northward as a frontier of god-kings, garrison towns, and temple-mountains raised to Shiva and Vishnu. Around 1238 that frontier loosened. Two Tai chieftains, Pho Khun Bang Klang Hao and Pho Khun Pha Mueang, drove out the Khmer governor of the citadel at Sukhothai — the name reads, in Sanskrit, as sukhodaya, “the dawn of happiness” — and Bang Klang Hao was raised on the throne as Si Inthrathit, Sri Indraditya, first king of the line later remembered as the Phra Ruang dynasty. The kingdom that opens here was small at its founding: a walled town and its dependent settlements, one Tai principality among several rising as the Angkorian tide drew back. Within two generations it would become, in the memory of the Thai people, the cradle of their writing, their kingship, and their faith.

A frontier kingdom and its making

The world into which Sukhothai was born was layered. Beneath the Tai newcomers, who had been filtering south for centuries down the river valleys, lay the older Mon settlements of the central plain, and over all of it the prestige of Angkor — its administrative Sanskrit, its devaraja kingship, its Brahmanical court ritual, the substrate of Hinduism that the Khmer carried into every dependency. Sukhothai inherited this Indic frame and then refigured it. Its kings would keep court Brahmans and the regalia of consecration; the Khmer-derived vocabulary of sacred rule never wholly left Thai kingship. But the devotional center of the new kingdom turned away from the temple-mountain of the god-king and toward the monastery, the relic, and the Buddha image.

Si Inthrathit reigned perhaps three decades. He was succeeded by his elder surviving son, Ban Mueang, and then by a younger son whose name the tradition fixes through a single act of war. When the boy was nineteen, a rival lord, Khun Sam Chon of Mae Sot, attacked the town of Tak; the king’s forces wavered, and the young prince rode his elephant into the breach, met Khun Sam Chon’s war-elephant in single combat, and broke the charge. For this his father gave him the name by which the kingdom’s golden age is remembered: Phra Ram Khamhaeng — Rama the Bold.

Ramkhamhaeng and the stone

Ramkhamhaeng came to the throne about 1279 and reigned roughly two decades. Under him Sukhothai’s reach, as the kingdom remembered it, ran far beyond the walls of its citadel — south through the peninsula toward the old Theravada center at Nakhon Si Thammarat, east into the Mekong toward Vientiane and Luang Prabang, and through marriage and overlordship into a constellation of Tai and Mon dependencies. This was suzerainty more than centralized empire: a web of personal allegiance and tribute, held by the prestige of a single ruler rather than by a standing bureaucracy. Sukhothai also looked outward across the sea, exchanging missions with the Yuan court of China and drawing the ceramic techniques that would make its kilns famous.

What anchors all of this is a four-sided pillar of stone. Inscription No. 1, dated to 1292 and written in 124 lines, is the earliest dated document in the Thai language, and it speaks — in its opening lines in the first person, then shifting to the third — in the voice of the king himself. It is at once a chronicle, a charter, and an idyll. It records the elephant duel and the names of the king’s parents; it describes a realm of plain justice and easy plenty, where there is fish in the water and rice in the fields, where trade passes untaxed at the gates, where any subject with a grievance may strike a bell hung at the palace and the king will hear the case himself. It describes a city of monasteries, golden images, and a sacred relic; it tells of a stone throne, the Manangkhasila, set under a sugar-palm grove where the king taught the Dhamma to his people on holy days. And it claims, in a line that would become a cornerstone of national memory, that in 1283 the king himself devised the Thai script — fashioning, out of the Khmer and Mon letters then in use, the writing in which the stone itself is cut.

That last claim, and the stone that makes it, sit at the heart of a debate that has run, unresolved, for nearly four decades. The pillar was found in 1833 at the ruins of Sukhothai by the prince who would become King Mongkut, Rama IV — then a monk, soon a reforming king, and a figure central to the modern Thai sense of nationhood. From the late 1980s the historian Michael Vickery and the art historian Piriya Krairiksh argued that the inscription is too good to be true: that its tone-marking is a complete modern system not securely attested again for centuries, that its vowels sit beside the consonants in a way unlike the demonstrably later Sukhothai inscriptions, and that its sunny portrait of a benevolent kingship reads suspiciously like a document a nineteenth-century reformer might wish to find — a forgery, or at least a heavily later composition. Against this, defenders point to the physical record — patina and weathering studies, electron-microscope examination of the cut surfaces — as consistent with great age, and to the difficulty of explaining away every archaic feature. The weight of scholarship now treats the stone as at least partly authentic, perhaps with later interventions; the controversy is unresolved, and it is not merely philological. To question Inscription No. 1 is to touch the founding charter of Thai literacy and the image of an ideal Buddhist king, and the dispute runs through Thai national identity as much as through paleography. The script-invention story and the golden-age it frames are, in the most exact sense, a national memory — cherished, contested, and not reducible to a settled fact.

The conversion that made the kingdom

If the stone is the kingdom’s contested charter, its uncontested core is religious. Sukhothai professed Theravada Buddhism, and it professed a particular strand of it: the Sihala or Lankavamsa lineage, the reform Buddhism of the Mahavihara at Anuradhapura, carried out of Sri Lanka in the wake of the great twelfth-century purification of the Sinhalese sangha. That reform had drawn young monks from across mainland Southeast Asia to Sri Lanka to take a fresh ordination in an unbroken line, and it carried with it the prestige of the forest-dwelling renunciant — the araññavāsī, the monk of the wilderness, set against the gāmavāsī of the settled town.

The channel into Sukhothai ran up the peninsula. Nakhon Si Thammarat had become a southern stronghold of the Lankan ordination, and from there Ramkhamhaeng invited a learned elder — a mahāthera honored as a patriarch of the sangha — to settle at Sukhothai. Inscription No. 1 places this forest community to the west of the city, at a monastery it names Aranyik, “the forest [dwelling],” amid the wooded hills where the ruins of Wat Saphan Hin and Wat Aranyik still stand. The arrangement was deliberate: the king kept the wilderness monks at the city’s western edge and the town monks within it, mapping the canonical division of the sangha onto the landscape of his capital. This forest-monastic ideal — strict in its discipline, oriented to meditation and the renunciant life — is the deep root from which much later Thai religion would draw; the modern Thai forest tradition of the twentieth century is a far later revival of the same wilderness vocation, not Sukhothai’s own establishment, but its lineage of legitimacy reaches back through exactly this Lankan transmission.

What the kingdom took from this faith governed how it understood the world. A subject of Sukhothai lived inside the law of karma, the moral weight of action ripening across the long chain of rebirth; merit accumulated by building monasteries, casting images, feeding the monastic order, and keeping the precepts bent the trajectory of future lives toward the heavens and, at the far end, toward release. The Buddha was present in the kingdom not as a distant teacher but as relic, footprint, and image — the focus of a devotion the inscriptions record in the language of festival, procession, and the great seasonal observances. The doctrinal architecture was that of the Theravada, the “Teaching of the Elders,” holding to the Pali Canon and the arhat’s path — distinct from the Mahayana and tantric currents that had shaped the Buddhism of Angkor, and which Sukhothai’s reform consciously left behind.

The conversion deepened across the dynasty. Ramkhamhaeng’s grandson Lithai — Maha Thammaracha I, “the great righteous king,” who reigned from the mid-fourteenth century — was the most learned of the line, a king who took temporary ordination as a monk and renewed the Lankan lineage by inviting a Sinhalese patriarch to Sukhothai to re-establish the forest ordination at the highest pitch of purity. To Lithai is attributed the Traibhūmikathā, the “Sermon on the Three Worlds,” composed around 1345 — the oldest surviving work of Thai literature. Drawn from the Pali Canon and its commentaries, it maps the whole Buddhist cosmos in vivid order: the hells beneath, the human and animal realm, the tiers of heavens rising to the formless summits, the vast continents set around the axial Mount Meru, the enchanted Himavanta forest at its foot — thirty-one planes of existence through which beings rise and fall by the merit and demerit of their deeds. It is a cosmology and an ethics at once: a king’s account, offered as a sermon for his mother, of the moral structure of a universe in which kingship itself is the fruit of accumulated merit and the duty of the righteous ruler is to govern by the Dhamma. For centuries the Traibhūmi shaped the Thai imagination of cosmos, kingship, and the afterlife, in painting and manuscript as much as in doctrine.

The walking Buddha and the kilns

Sukhothai’s faith found its most original expression in bronze. The sculptors of the kingdom developed a manner of representing the Buddha unlike any before it: a body of long sinuous limbs and smoothly flowing robes, boneless and weightless, the oval face downturned in an inward calm, the cranial protuberance crowned by a tall flame — the ketumālā, a flame-finial that betrays the Sri Lankan ancestry of the style. Sukhothai sculptors pressed the ancient list of the marks of a great being toward an almost abstract elegance: arms tapering like an elephant’s trunk, fingers long and even as lotus buds, the whole figure resolved into pure curve.

Their boldest invention was the walking Buddha. Cast freestanding by the lost-wax method, the figure strides forward — one heel lifting from the ground, the robe streaming, the right hand raised in the gesture of reassurance, abhayamudrā — caught in motion in a way the art of India had never attempted. The image draws on the legend of the Buddha’s descent from the Tāvatiṃsa heaven, where he had gone to teach the Dhamma to his mother, returning to walk again among living beings; in bronze it becomes a figure of serene momentum, the awakened one moving through the world rather than withdrawn from it. The walking Buddha has no known prototype outside Sukhothai, and it remains the kingdom’s signal contribution to the art of the Buddhist world.

The same kingdom that cast these images ran one of the great ceramic industries of medieval Southeast Asia. Along the Yom River at Si Satchanalai — Sukhothai’s twin city to the north — and at Sukhothai itself, hundreds of dragon kilns produced the stonewares known collectively as Sangkhalok, after Sawankhalok, the river town at the heart of the trade. The potters worked celadon glazed in soft sea-greens over incised lotus and fish, and wares painted in iron-black under a clear glaze. By the fourteenth and fifteenth centuries these were a major export, carried in the holds of trading junks across the archipelago to Java and the Philippines and out to Japan and the western seas — demand that surged when the Ming court closed China’s own kilns to foreign export and left a gap that Sukhothai’s potters were positioned to fill. The shards of Sangkhalok recovered from shipwrecks and island markets across the region are the material proof of a small inland kingdom that reached the open sea through its rivers and its craft.

The closing of the dawn

The golden age was a single long generation, and its frame was always provisional. To the north, the Tai kingdom of Lanna under Mangrai had risen at the same moment; to the south, in the lower Chao Phraya, a more centralized rival was gathering. Ayutthaya, founded in 1351, controlled the river’s mouth and the wealth of maritime trade, and it built the standing administration that Sukhothai’s web of personal allegiance never had. The balance tipped within a century of Ramkhamhaeng. By 1378 the kings of Sukhothai acknowledged the supremacy of Ayutthaya and ruled as its vassals. The line continued — Maha Thammaracha IV, the last of the Phra Ruang kings, reigned at Sukhothai from 1419 to 1438 — but as a tributary principality, its sovereignty already gone.

When that last king died in 1438, the king of Ayutthaya, Borommaracha II, did not replace him with another Phra Ruang ruler. He installed his own son — the prince later crowned at Ayutthaya as Borommatrailokkanat, himself named for the Three Worlds of Lithai’s great sermon — as governor of Sukhothai. With that appointment the dawn-city ceased to be a kingdom and became a province governed from downstream. The court that had cast the walking Buddha and weighed grievances at the bell now answered to a viceroy; the citadel that had begun by driving out a Khmer governor ended by receiving one of Ayutthaya’s. There is a closing symmetry the kingdom itself supplied: the prince set over the dawn-city to extinguish it carried, in his throne-name, the title of the very cosmology a Sukhothai king had written. The frontier that had loosened against Angkor two hundred years earlier had hardened again, this time around a rival nearer the sea, and the throne at Sukhothai was empty of its own line for good.

Sources and scholarship

The kingdom is read, above all, through its inscriptions, and the inscriptions through a controversy that has run for nearly four decades. Inscription No. 1, the Ram Khamhaeng stele of 1292, was inscribed on the UNESCO Memory of the World register in 2003; the case for and against its full authenticity — Michael Vickery’s forgery thesis and Piriya Krairiksh’s later-dating arguments versus the prevailing partly-authentic view, with its physical and paleographic evidence — is set out and weighed in the long debate captured at outlets such as New Mandala’s review of the question, and in the Journal of the Siam Society, where Vickery and his critics fought the matter out across successive issues from 1986 onward. The standard collection of the Sukhothai corpus is The Inscriptions of Sukhothai in the Corpus of Inscriptions series edited by A.B. Griswold and Prasert na Nagara, whose translations and commentary remain the working basis for the period; the Journal of the Siam Society archive hosts much of the primary scholarly exchange.

For the religious history — the transmission of the Mahavihara lineage from Sri Lanka through Nakhon Si Thammarat, and the forest-monastic ideal that came with it — the survey at the Oxford Research Encyclopedia of Religion traces the Asian foundations of the Theravada that Sukhothai professed. Lithai’s Traibhūmikathā survives in the scholarly tradition descending from George Cœdès and B.J. Terwiel and was rendered into English by Frank E. and Mani B. Reynolds as Three Worlds According to King Ruang (1982); the work and its manuscript afterlife are summarized at the Trai Phum Phra Ruang reference. The art is treated in the museum and academic literature on the walking-Buddha type, including the analysis at Smarthistory; the political narrative of founding, suzerainty, and absorption rests on George Cœdès’s foundational The Indianized States of Southeast Asia and the synthesis in David K. Wyatt’s Thailand: A Short History.

→ In the library: The Dhammapada (Müller, 1881) — a canonical Pali verse-text of the tradition Sukhothai professed · Buddhist Suttas (Rhys Davids, 1881) — early discourses of the Pali Canon

→ Related: Khmer Empire · Buddhism Theravada · Buddhism · Buddha · Monasticism · Karma · Reincarnation · Angkor Wat · Hinduism · Vishnu · Shiva · Thai Forest Tradition · Meditation