Wat Phra Mahathat Woramahawihan became the principal temple of Nakhon Si Thammarat. The principal stupa, Phra Borommathat Chedi, was built in the early 13th century. This gigantic-bell-shaped stupa, is the outstanding structure at the temple. And thereby it become a sacred place for the Buddhists. After the state was under control of Ayutthaya, the Kingdom of Thailand, flourished during 1350-1767, the temple remains the religious center of Buddhism.