The Thai Sangha: the history and organisation of a monastic community

More than forty-four thousand registered temples, and several hundred thousand monks and novices depending on the period: the Thai Sangha is an institution of considerable scale. Yet there is nothing immemorial about its present form. It is the product of gradual construction. First came the creation of the office of Supreme Patriarch at the end of the eighteenth century, then a reform launched by the future King Mongkut, and finally three successive laws, in 1902, 1941 and 1962, the last of them amended several times. How is this community governed? How do its two orders coexist? What place does the state occupy in its administration? This article traces the architecture of an institution central to the country's religious life.

The Sangha, between ancient discipline and modern law

In the strict sense, the Pali word saṅgha (‘assembly’, ‘community’) refers, in Theravāda Buddhism, to the whole body of ordained religious. It comprises the bhikkhu, monks who have received full ordination, and the sāmaṇera, novices who have not yet received it. Their life is governed by the Vinaya, the monastic discipline handed down in the Pali Canon: rules of conduct, ordination procedures and internal sanctions. This discipline is common to the entire Theravāda world.

In Thailand, it is overlaid by a second body of rules specific to the country. This is national law, laid down by successive statutes. It organises the hierarchy, appoints those in charge, registers temples and involves state agencies in religious administration. The first body of rules belongs to religious tradition. The second is a historical construction, developed for the most part between the late eighteenth century and the second half of the twentieth, then revised on several occasions.

This article concerns that second body. It shows how the Thai Sangha acquired a head, a council and a territorial administration, and how two monastic orders coexist within it. It also examines what the available figures allow us to say, and what they do not allow us to establish. Other important aspects would each merit a study of their own and are not covered here: the training of monks, the details of ecclesiastical ranks and the social role of temples.

Before the law: a patriarch, sections and a reform

An office born with Bangkok

The office of Supreme Patriarch was created in 1782–1783, or 2325 in the Buddhist Era. In Thai, it is known as Somdet Phra Sangkharat, from the Pali saṅgharāja, literally ‘king of the Sangha’. Its creation came at the very beginning of the Rattanakosin era, that of the dynasty established in Bangkok by Rama I. It placed a single religious figure at the summit of the monastic community. The office has endured through the two centuries since and remains the keystone of the institution today.

The four sections under Rama III

A comparative study published in the Journal of the International Association of Buddhist Universities describes the organisation of the Sangha under Rama III (1824–1851). At that time it was divided into four sections: North, South, Centre and araññavāsī. This Pali term refers to monks ‘dwelling in the forest’. The forest section was subsequently reduced to a bare minimum: all that remained of it was a superior's title, to which no monastery was attached. A unified, systematic hierarchy modelled on the civil administration would not appear until 1902.

Mongkut and the birth of the Dhammayut

It was during this same reign that a movement emerged which would lastingly transform monastic organisation. In 1824, Prince Mongkut, the future King Rama IV, entered the monkhood at the age of twenty. In 1833, under his monastic name of Vajirañāṇo Bhikkhu, he founded a reform movement, the Dhammayut (Thammayut in Thai transcription). The name derives from Pali and evokes adherence to the Dhamma, the teaching of the Buddha.

The aim was to bring monastic practice into strict conformity with the Vinaya and the Pali Canon. It was also to set aside elements that the movement's promoters considered syncretic, that is, arising from a mingling with other beliefs, or foreign to canonical teaching.

In 1836, Mongkut became the first abbot of Wat Bowonniwet Wihan in Bangkok, which would become the movement's headquarters. He remained a monk until his accession to the throne in 1851. For almost seventy years, the Dhammayut remained a reformist current within the Sangha, without the status of a separate order. That recognition would come with the law of 1902.

1902: the first unified hierarchy

A founding law

The first law on the administration of the Sangha was promulgated during the reign of Rama V (Chulalongkorn). Most sources date it to 1902, which corresponds to year 121 of the Rattanakosin era (R.S. 121). One university dissertation consulted puts forward another date, but the equivalence it proposes with the Buddhist calendar is inconsistent. The exact date of promulgation therefore needs to be checked in the Thai official journal, the Royal Gazette. The magazine The Diplomat presents this text as the first unified and systematic Buddhist hierarchy in Thai history.

A council, districts and a chain of command

The text first created a Mahathera Samakhom, literally ‘assembly of the great elders’. In Pali, mahāthera denotes a senior and eminent monk. This council was tasked with assisting the king on religious matters and on the administration of the Sangha. It had eight members: the four chao khana yai, or great superiors, and their deputies. It would later be chaired by the Supreme Patriarch.

The law then divided the Sangha into four major jurisdictions: North, South, Centre and Dhammayut. The forest section no longer appeared on this list. The movement founded by Mongkut, on the other hand, became an officially recognised order.

Above all, the monastic hierarchy now followed the civil divisions of the kingdom: provinces, districts (amphoe) and sub-districts (tambon). The district ecclesiastical head exercised direct authority over the abbots, the chao awat, who ran each temple. These abbots reported to district and regional officials. The law also extended registration to every temple in the country, whether royal or ordinary. Finally, according to The Diplomat, texts and teaching switched to standard Thai, which replaced Pali and the local languages.

These provisions laid down a pattern that recurs, with adjustments, in the laws that followed: a head, a council and a chain of command running parallel to the state administration.

1941 and 1962: two successive architectures

The 1941 law

The second Sangha law was adopted in 1941 (2484 B.E.) and remained in force for twenty-one years. It is often described as ‘democratic’. An article published by New Mandala, a platform affiliated with the Australian National University, offers an analysis of it. According to its author, the law established a deliberative model in which monks sat on an equal footing regardless of seniority. Again according to this analysis, the principle is said to have caused tensions with some of the most senior monks.

The 1962 law, still in force

The third law dates from 1962 (2505 B.E.). It was adopted under the government of Field Marshal Sarit Thanarat and repealed its predecessor. It re-established a centralised Supreme Sangha Council under the authority of the Supreme Patriarch. It also distinguished two levels of administration, one central and the other local. The Council was set up on 1 January 1963.

More than sixty years later, this text remains the basic law. It has been amended three times, in 1992, 2017 and 2018. The scholar Benjamin Schonthal has studied it from a comparative perspective across South and Southeast Asia. In his view, the law gives the Patriarch, the Council and the officials who assist them formal legal authority over monks. This authority is exercised through a hierarchy that mirrors the organisation of the civil administration.

The central bodies

The Supreme Patriarch

The Patriarch's full title is Somdet Phra Sangharaja Sakalamahasanghaparinayaka. The second term may be rendered approximately as ‘guide of the entire great Sangha’. The Patriarch is the head of the Thai Sangha and ex officio president of the Supreme Council. His authority extends to the two Theravāda orders and to the small Mahāyāna minority, the other great branch of Buddhism, present in Thailand through the Chinese and Vietnamese communities. He holds office for life.

The method of appointment has changed recently. According to the AsiaNews agency, the Prime Minister previously put forward a name with the agreement of the Supreme Council, after which the monarch made the appointment. An amendment was tabled on 27 December 2016 and passed by 182 votes with 6 abstentions. It came into force at the beginning of 2017. Since then, the king has appointed the Supreme Patriarch, with the countersignature of the Prime Minister. AsiaNews and several general works describe this provision as a return to the old tradition of royal appointment.

This reform followed a long vacancy in the office. Somdet Phra Nyanasamvara, appointed Patriarch in 1989 by King Bhumibol, died in October 2013 at the age of one hundred. The office remained unfilled until 2017.

On 7 February 2017, Somdet Phra Ariyavongsagatanana IX was appointed the 20th Supreme Patriarch. His Dhamma name, that is, his monastic name, is Amborn Ambaro. The ceremony took place on 12 February at Wat Phra Kaeo, the Temple of the Emerald Buddha, within the precincts of the Grand Palace. Born Amborn Prasatthapong on 26 June 1927 in Ratchaburi province, he belongs to the Dhammayut order, of which he is also the superior general. He had become abbot of Wat Ratchabophit in 2008 and had received the title of Somdet in 2009.

The Supreme Sangha Council

The Supreme Sangha Council takes up the Thai name of the assembly created in 1902: Mahathera Samakhom. It is the governing body of the Sangha and the ultimate authority in ecclesiastical affairs. Its composition has evolved in three stages.

• The original 1962 arrangement: the Supreme Patriarch, as chair; all the Somdet Phra Rajakhana as ex officio members; and between four and eight Phra Rajakhana appointed by the Patriarch for two years. These two expressions denote ranks in the hierarchy of monastic titles.
• The situation before 2018, according to the Bangkok Post: twenty members in all. Eight seats went to the most senior monks, holders of the rank of Somdet. Twelve members were appointed by the Patriarch, six from the Maha Nikaya and six from the Dhammayut, all of a rank equivalent to ‘vice-Somdet’. The king endorsed these appointments.
• The amendment of 6 July 2018: the National Legislative Assembly passed it in three readings, by 217 votes with 4 abstentions. The appointment and dismissal of Council members now rests with the king.

The ecclesiastical titles themselves, including that of Somdet, are conferred by the king under the 1962 law. Their detailed hierarchy lies beyond the scope of this article.

State agencies

The 1962 arrangement involves the civil administration in the workings of the Sangha. The Minister of Education is responsible for implementing the law. The director-general of the Department of Religious Affairs is ex officio secretary-general of the Supreme Council.

An administrative reform altered this arrangement in 2002. It created the National Office of Buddhism (NOB), an independent body that took over some of the functions of the Department of Religious Affairs. The latter was attached to the Ministry of Culture. In 2025, the press reported that the post of secretary-general of the Council was being held on an acting basis by Associate Professor Chatchapol Chaiyaporn.

Two orders under a single authority

The Thai Theravāda Sangha is divided into two orders, or nikaya. This Pali word means ‘group’ or ‘body’ and here denotes a monastic lineage.

The Maha Nikaya (Maha Nikai in Thai transcription), the ‘great order’, comprises by default all Theravāda monks who do not belong to the Dhammayut. Originally, it was distinguished by no doctrine of its own: it was the existence of the reform movement that brought this majority grouping into view by contrast. According to the Thailand Foundation, it accounts for more than 90% of the country's monks.

The Dhammayuttika Nikaya (Thammayut) is far smaller. It retains its headquarters at Wat Bowonniwet and its original vocation: a practice aligned with the Vinaya and the Pali Canon. It has spread beyond Thailand's borders, to Cambodia (as early as 1855 according to one general source) and Burma. General works credit it with the majority of royal monastic titles and most of the Supreme Patriarchs. This claim would need to be confirmed by official data.

Both orders are placed under the common authority of the Patriarch and the Supreme Council. The parity of six seats each among the appointed members of the Council, in force before 2018, reflected this organised coexistence. To these are added two small Mahāyāna groupings, also under the authority of the Patriarch: the Chinese Nikaya and the Annam Nikaya, of Vietnamese origin.

What the figures say

Temples

As of 1 March 2025, the National Office of Buddhism recorded a total of 44,195 temples, according to data reproduced in an online compilation. The breakdown is as follows:

• 311 royal temples (phra aram luang), of which 63 belong to the Dhammayut and 248 to the Maha Nikaya;
• 43,842 ordinary temples, of which 4,720 are Dhammayut and 39,122 Maha Nikaya;
• 42 Mahāyāna temples: 17 for the Chinese Nikaya and 25 for the Annam Nikaya.

This distribution confirms the numerical imbalance between the two orders: roughly one Theravāda temple in nine belongs to the Dhammayut. It also shows that the latter occupies a comparatively larger place among royal temples, where it accounts for about one temple in five. These figures should nonetheless be handled with caution. In 2018, an article in the Bangkok Post gave a figure of 37,075 temples. The origin of this discrepancy has not been established: it may stem from differing definitions, counting methods or reference dates.

Monks and novices

The available figures come from disparate sources and do not form a continuous series:

• 1964: 237,770 monks and novices for a population of 28,072,431, or one religious for every 110 inhabitants. This figure is cited by the monk and scholar P. A. Payutto in a work published in 1984.
• Same work, with no precise reference date in the extract consulted: around 91,138 monks ordained for the three months of the rains retreat, 61,372 so-called ‘regular’ monks and 85,260 novices.
• January 1999: 365,140 religious, comprising 267,300 monks and 97,840 novices, according to the Ministry of Education.
• December 2016: around 200,000 monks and 70,000 novices, according to a press estimate.
• April 2018: ‘more than 300,000 monks’, according to the Bangkok Post.

These discrepancies are partly explained by a practice peculiar to Thai Buddhism: temporary ordination. Many men take the robe for a limited period, particularly during the rains retreat (phansa), a three-month period often called ‘Buddhist Lent’, during which monks remain in their monastery. Payutto estimated that around 60% of ordinations were of this kind. He noted that at the end of the retreat, some isolated rural areas were short of monks. The time of year chosen for a count therefore weighs heavily on the result.

Over the long term, an article published in the Journal of Buddhist Studies of Chulalongkorn University describes a decline in numbers. It cites a survey conducted between 2007 and 2010 showing a slight rise in the number of monks but a fall in the number of novices. No official statistics on the number of monks after 2018 could be consulted for this article.

Resources

In 2018, the Bangkok Post estimated that donations received by temples amounted to around $3.5 billion a year. State support stood at 4.67 billion baht, or about $137 million. These press figures give an order of magnitude. They are a reminder that temple resources come first and foremost from the donations of the faithful.

2025: a law under revision

In 2025, following sexual misconduct scandals involving high-ranking monks, the Supreme Sangha Council met in special session. According to the Bangkok Post, it took two decisions. It set up a special committee to revise the Sangha law and its related texts; the committee's proposal is to be submitted to the Supreme Patriarch. It also restated an obligation: superiors must immediately suspend any monk who has breached monastic discipline and pass the evidence on to the monastic authorities. On this occasion, the Council acknowledged that the 1962 law was no longer suited to present-day challenges.

This revision forms part of an already long history, which scholars read in different ways. Benjamin Schonthal observes that, since the 1902 law, regulatory crises have recurred regularly. The author of the analysis published by New Mandala considers that, with the amendments of 2017 and 2018, the structure of the Sangha has returned ‘almost to the starting point’, that is, to the organisation of 1902. These readings remain interpretations; they help to place recent developments in a longer perspective.

Several constants emerge from this survey. The Thai Sangha holds together an ancient religious discipline, shared with the whole Theravāda world, and a national legal organisation built up over little more than a century. This organisation rests on a few elements that have remained stable since 1902: a Patriarch for life, a council of elders and a hierarchy that follows the provinces, districts and tambon down to the abbot of each temple. It frames two orders of very unequal size, united under a single authority. Successive reforms have mainly concerned the composition of the council, the method of appointing its members and the state agencies that assist it. The committee announced in 2025 should open a new chapter in this history.

Sources and further reading

1. non précisé dans l'extrait, Declining Number of Buddhist Monks and Its Impact on the Future of Buddhism, Chulalongkorn University – Journal of Buddhist Studies (ThaiJO), n.d..
2. non précisé (mémoire universitaire hébergé), Sangha's Administration in Thailand (Buddhist Education in Thailand), Wisdom Library, n.d..
3. non précisé dans l'extrait, A Comparison on the structure of Buddhist Sangha administration, Journal of the International Association of Buddhist Universities (ThaiJO), n.d..
4. Benjamin Schonthal, Formations of Buddhist constitutionalism in South and Southeast Asia, International Journal of Constitutional Law (I·CON), Oxford University Press, vol. 15(3), 2017.
5. Bangkok Post, Sangha Act to be revised after senior monks' sex scandals, Bangkok Post, 2025.
6. Thailand Foundation, Buddhism in Thailand – Maha Nikaya and Dhammayuttika Nikaya, Thailand Foundation, n.d..
7. Contributeurs Wikipedia, Sangha Supreme Council, Wikipedia, consulté 2025.
8. Contributeurs Wikipedia, Supreme Patriarch of Thailand, Wikipedia, consulté 2025.
9. Contributeurs Wikipedia, Dhammayuttika Nikaya, Wikipedia, consulté 2025.
10. Contributeurs Wikipedia, National Office of Buddhism, Wikipedia, consulté 2025.
11. Khemthong Tonsakulrungruang (attribution à vérifier), Thailand's sangha: turning right, coming full circle, New Mandala (Australian National University), 2018.
12. non précisé dans l'extrait, Is Thailand's Buddhist Sangha Undergoing a Political Sea Change?, The Diplomat, 2022.
13. Contributeurs Wikipedia, Ariyavongsagatanana (Amborn Ambaro), Wikipedia, consulté 2025.
14. Bangkok Post, King now has sole power to appoint Supreme Patriarch, Bangkok Post, 2017.
15. AsiaNews, Assembly's surprise move gives the king the power to appoint supreme patriarch of Buddhism, AsiaNews.it, 2016.
16. Contributeurs Wikipedia, Ecclesiastical peerage of Thailand (mention de l'amendement de janvier 2017), Wikipedia, consulté 2025.
17. Buddhistdoor Global, Thailand Appoints New Supreme Patriarch to Head Monastic Sangha, Buddhistdoor Global, 2017.
18. Bangkok Post, NLA votes to pass Sangha Act – Law allows King to pick SSC members, Bangkok Post, 2018.
19. Contributeurs Wikipedia, Maha Nikaya, Wikipedia, consulté 2025.
20. Contributeurs Wikipedia, d'après l'Office national du bouddhisme, List of Buddhist temples in Thailand (données ONB au 1er mars 2025), Wikipedia, 2025.