was mentioned by Prince Damrong Rachanuphap in the Lopburi Chronicles that "..the Lopburi City Pillar is near the market to the north of the palace.
It is called Son Phra Ram. It is not clear if it existed in pre-Khmer times or duting them. It is calld Son Phra Ram due to the epic Ramayana as the foundation legend of this city. Thai is, upon completing his battle with Thotsakan, Rama went back to rule Ayothaya and wished to build a city over there, so he shot an arrow which landed on a mountain and leveled it. Hanuman went to it and used his tail to create earth walls to mark where the city would be founded. Vishnu the god came down to construct the city. When finished, Rama gave the city the name of "Lopburi". Therefore, it is the local belief that this city pillar was Rama's arrow that turned to stone and the still visible earth mounds were made by Hanuman's Tail. It is later said that Rama's arrow created and a widespread fire, which may have accounted for Lopburi's abundance in white-clay body powder in cake form, or clay that was heated by Rama's arrow. The monkeys at the shrine are regarded as the descendents or servants of Hanuman. The front of the shrine has a small pool with the huge green rock in the middle. It is believed that if the water dries up, there will be a fire.
The shrine houses images of the Chinese gods of Kuan U, Khao Tok, Pun Thao Kong and Pun Thao Ma.