Suphanburi was an ancient province. Researchers found evidence that is over 2500 years old. Artifacts have been found from the Stone Age, Iron Age and successive cultures including the Suwannapoom period, Funan, Aummarawadee and Sriwichai. The old name of Suphanburi was Tarawadeesrisuphannapoom or Phan tumaburi, on a bank of Ta Jeen River. In the Ayuttaya period it was a capital city. Suphanburi was an outpost city and an important granary