Wiang Prueksa

Following the fall of Yonok Nakhon and the end of the Singhanati dynasty in the 6th century,^[1][7]: 7 a group of survivors led by Khun Lang, together with Khun Phanna and other community leaders, migrated east of the former Yonok capital to establish a new settlement on the western bank of the Mekong River.^[1][3]: 98 This settlement became known as Wiang Pueksa or Wiang Prueksa,^[1] also referred to as Wiang Chiang Saen Noi (Little Chiang Saen).^[2]

The ruler of Wiang Pueksa was not selected through hereditary succession but through public consultation, a process known as pueksa (ปรึกษา; lit. 'consultation'). According to the chronicles, the inhabitants collectively chose their leader, following principles resembling a proto-democratic system, in which each settlement appointed its own governor.^{[3]: 98, 101} In total, sixteen rulers of Wiang Pueksa are recorded in the traditional accounts.^[3]: 105

During the same broad period, a new political center emerged in the Doi Tung region under Lao Chakkaraj, regarded as the first ruler of Hiran Ngoenyang Chiang Lao. Lao Chakkaraj consolidated surrounding settlements to form this polity and founded the Lao dynasty, which later became the royal lineage of King Mangrai, the founder of the Lan Na Kingdom.^[8][9][10]

The list of rulers is derived from the Legend of Singhanati. However, the chronology proposed in the 1973 critical edition of the legend prepared by Manit Vallipodom raises significant historiographical concerns. In this edition, the regnal years of the 16 monarchs are dated between 1558 and 1638 BE (1015–1095 CE),^[3]: 105 based on Manit's identification of the years given in the original legend with the Chula Sakarat era.^{[3]: 98–101} This dating conflicts with other textual traditions, which associate Wiang Prueksa with the era of Lao Chakkaraj,^{[4]: 53–4} whose reign is conventionally placed in the mid-7th century CE, beginning around 638^{[11]: 241–3}/639 CE.^[12]: 676 Moreover, during the period proposed by Manit, the Chiang Saen area—the center of Wiang Prueksa—is generally understood to have been in the late phase of Ngoenyang, which itself is regarded as the successor polity to Wiang Prueksa.

Phiset Chiachanphong has proposed instead that the Tṛtīya Era (ตติยศักราช, tertiary era) named in the legend is the Shaka era.^[13] On that reading the last reign at Wiang Prueksa coincides with the accession of Lao Chakkaraj; the final column of the table gives the resulting dates.