Locally called Wat Mu. The temple was built by a Chinese merchant called U. Locals thus called it Wat Chin U, and later shifted to Wat Mu. Rama III had it entirely renovated and renamed it Wat Apsonsawan.

The congregation hall of this temple is unique for it has 28 images on the same base, and all are cast in the Subduing Mara attitude of the same size, 1 foot by 1 and 2 inches. They are cleverly placed in tiers. Each is inscribed with its name at the base front. The 28 Buddha images represent the 28 lives of the Buddha, a traditional Buddhist practice in the similar fashion as the building of the 28 pagodas around the main hall in Wat Suthat Thepwararam in Bangkok.