It was assumed that once the city Dvaravati. There's evidence the walls of the mound and ditch the Dong Drama. But the evidence in Ayutthaya, Nakhon Nayok outpost in eastern king U thong Later in 2437, he characterized the reign of King Rama 5 is divided by county. Nakhon Nayok, Prachin Buri had lived in the county until 2445 when he broke with tradition to have the position you occupy and the governor was replaced during the 2486-2489 Nayok has been transferred to the provincial total. Prachin Buri and Saraburi Then separate independent province.