At roughly the center of the walled city, in the district where the former rulers of Chiang Mai built their palaces, stands the monument to the 'Three Kings' -- King Mengrai, the founder of Chiang Mai; his contemporary and reportedly good friend King Ramkamhaeng of Sukothai; and King Ngam Muang of Payao.
According to legend, the three worked together to lay out the city of Chiang Mai. The sculpture has become something of an iconic image representing Chiang Mai. You will see it reproduced in various forms all around the city.
The sculpture stands in front of the old provincial administration building, which now houses the Chiang Mai City Art & Cultural Center.

Source: Trip Advisor