Ayutthaya period.It appears the event is King ramathibodi I (Chulalongkorn) has set the town sing buri is a town and capital city ball buri and mueang Phrom buri city larn Luang.
Ayutthaya, the event is important. The reign of King Rama 1 (God AEL) has a set of Singburi Kochi City. Phrom Buri town and city, and set the city Luang.