Wat Mahawan, explained that it was constructed in 657 A.D (1200 B.E.) by the queen Cham Thewi, the first ruler of Hariphunchai kingdom, is located close to the center of Lamphun town, roughly speaking, in the middle of the royal temple Wat Phra That Haripunchai and the temple where ashes of the queen Chama Thewi are enshrined, Wat Cham Thewi.
This temple is famous for the image of the Buddha seated under the Naga's hood which is believed to be Phra Phutta Sikkhi or Phra Sila Dam (The Black Stone Image) taken from Lawo (present Lopburi in the center of Thailand) by Phranang Chama Thewi, the first ruler of Haripunchai kingdom.