Nakhon Pathom was located in the
Gulf of Thailand 2000 years ago, but is steadily receding southward as a result of sedimentation. Nakhon Pathom, along with Ratchaburi and Sing Buri, is considered one of the oldest cities in Thailand, having been founded as far back as 40 BC. It was for a long time one of the important capitals of
Dvaravati, a prestigious Mon kingdom from Lop Buri to
Malaysia. The Indian King Ashoka sent monks to Siam at this time to popularize
Theravada Buddhism. They arrived in Nakhon Pathom and from there toured the country. Hence the city's self-image of having spread
Buddhism throughout Siam. In April 1842, trouble broke out between three groups of
Chinese who had formed secret societies, each with about 1,000 men. The leaders of these groups were named Khim, Ia and Phiao (Piaw). The Siamese government sent
soldiers under the command of Phra Sombat Wanit to arrest the leaders. In fact, Khim and Phiao were the first to be thrown into the dungeon, but Ia managed to escape. He then robbed the houses in the Samut Sakhon and Nakhon Pathom area along with his people. They could only be overpowered after a large police operation. In the 1930s, Nakhon Pathom was a nest of 300 houses and about 12. Buddhist temples. There was also the famous monks' retreat at Bang Thammasala. == Geography ==