Wat Ko

The name Wat Ko ("island temple") comes from its original setting, surrounded by water: the Phetchaburi River on the west and channels branching off it to the north and south. Its founding history is unclear.

The ordination hall (ubosot) is in late Ayutthaya style, with a base curved like a junk's hull. Its murals are dated 1734 (BE 2277), in the reign of King Borommakot. They are regarded as one of the most complete surviving sets of Ayutthaya-period murals in Thailand and show the distinctive style of the Phetchaburi school of craftsmen.

The main chedi is a large Ayutthaya-style bell-shaped stupa decorated with stucco. The sermon hall (sala kan parian) is an open Thai-style wooden building; an inscription says it was built in 1888.