Excavations at Karivalamvanthanallur in Tenkasi district have uncovered evidence of continuous human occupation from the Stone Age to the Sangam Age.
The excavation is being carried out by the Tamil Nadu State Department of Archaeology (TNSDA), which has opened 18 trenches at the site.
Archaeologists have found microlithic stone tools, brick structures, iron-working remains, and craft-production workshops, indicating long-term settlement and industrial activity.
The discoveries suggest that the site was an important centre for craft production, iron technology, and trade during the Sangam period.
The excavation is part of Tamil Nadu's wider archaeological programme, which also includes the Keeladi excavations.