Khao Sai On Archaeological Site

The Khao Sai On archaeological site in Lopburi Province reveals metalworking dating to the 1st millennium BC, positioning it among Southeast Asia's earliest known metalworking centers [1]. Excavations began in 1988 and continued through 2007 [1]. Burial practices at the site provide additional insights into the social and ritual life of these prehistoric communities [1]. The artifacts showcase copper's central role in the ancient economy and technological development of the region [1].