Nakhon Sawan has existed since before the Sukhothai era. The name of this city appears in Sukhothai’s stone inscription and it was called Phra Bang city which was an important frontier city for the wars. It later changed to Chon Tawan city and finally to Nakhon Sawan, but normally it was called Pak Nam Pho city. There is some archaeological evidence that indicated that Nakhon Sawan had been an agricultural city since the beginning of the historical era, and later acted as a centre of transportation and a location for Chinese traders.
Cr.Tourism Authority of Thailand