Stock Photo: Wat Phra Mahathat Vihan is the most important temple of Nakhon Si Thammarat and southern Thailand It was constructed at the time of the founding of the town, and contains a tooth relic of Buddha The 78 m high chedi is surrounded by 173 smaller ones While the chedi is now in Sri Lankan style, it is said to be built on top of an earlier Srivijaya style chedi.