Wat Phra That Doi Chom Thong (Thai วัดพระธาตุดอยจอมทอง) is located in Nakorn Chiang Rai, Amphoe Mueang Jangwat Chiang Rai, Thailand.
Doi Chom Thong has undoubtedly been a sacred site for a very long time. The site was surely reverenced as the home of local spirits before Buddhism arrived in the area. As in many Thai wats Spirit Houses coexist happily with the newer Buddhist shrines. Elephants are part of the lore of Doi Chom Thong. Paw Kuhn Meng Rai was said to have been following an elephant that had wandered off when he first came upon Doi Chom Thong, a solitary hill on the banks of the River Kok.
According to the Yonok Chronicle, the That or Chedi was originally built in the year 940 during the reign of Phraya Ruen Kaew, Prince of Chiang Rai, to house the Lord Buddha’s relics.
Those relics were originally acquired by Prince Pangkaraj of Yonok Nakpan, who divided them into three parts for the three temples of Wat Phra That Doi Tung, Wat Phra That Chomkitti, and Wat Phra That Doi Chom Thong, respectively.
Later, in 1260, King Meng Rai was said to have visited Doi Chom Thong where he viewed the surrounding area and found it suitable for the establishment of a city. He then ordered the beginning of the construction of the city of Chiang Rai and had Wat Phra That Doi Chom Thong restored.
—from a sign posted at the site
In 1992 (B.E. 2535) the City Pillar was moved from Wat Klang Wiang to Doi Chom Thong.
David K Wyatt and Aroonrut Wichienkeeo give 1262/1263 CE as the date of the founding of Chiang Rai in their Second Edition of The Chiang Mai Chronicle, Silkworm Books, ISBN 974-7100-62-2.