The ancient site of Khai Noen Wong, also at Tambon Bang Kacha, was established as the town in circa 1834 during the reign of King Rama III. The town was moved from Ban Lum to this location because of its high grounds which were more suitable for defensive purposes against the invading Vietnamese. The laterite walls and bricks from the old town were also dismantled and moved to the new site. A serve drought during the reign of King Rama V forced its return to the original site at Ban Lum.
The old town at Khai Noen Wong was square-shaped with extensive laterite walls mounted with large cannons. Each side had its own ramparts and defensive moats. It was regarded as a powerful military camp of the time. The town’s principal temple was Wat Yothanimit.