Luang Pho Yai is a standing Buddha image carved from sandstone or laterite, depicting the Buddha in the teaching gesture (Vitarka Mudra), with the right hand raised to chest level and the left hand resting alongside the body. The facial features are rounded and gentle, and the hair is smooth without distinct curls, reflecting early Dvaravati artistic influence that still shows strong connections to ancient Indian art traditions.According to local tradition and historical accounts, the Buddha image was originally discovered at a site known as “Nong Phra,” a natural water and ancient settlement area north of Khon Sawan community. In 1925 (B.E. 2468), it was brought to Wat Khon Sawan by the district chief Khun Banchakhadi, together with local villagers, for preservation and public worship.

Within the temple grounds, numerous intricately carved sandstone boundary stones have been found, indicating that this area once served as an important religious center. In addition, a rare traditional wooden ordination hall (sim) in the Lao-Isan architectural style can still be found, representing a cultural heritage that is increasingly rare today.Overall, Luang Pho Yai and the surrounding archaeological evidence at Wat Khon Sawan are not only sacred objects of local reverence but also important historical records that reflect the overlapping civilizations of Dvaravati, Khmer, and Lan Xang. This makes Wat Khon Sawan a valuable cultural and educational heritage site at both local and regional levels.