It is located 300 metres from Wat Phra Mahathat. Legend has it that Chao Sam, one of the three siblings, incited the other two siblings named Chao Ai and Chao Yi against each other for the throne. Both Chao Ai and Chao Yi died and Chao Sam became the ruler. Chao Sam then built one prang and one chedi for his late brothers. Both are presumed to have been built 600 years before the establishment of the Ayutthaya Kingdom.
- Wat Khoi
- Wat Klai Kangwon