A portion of a circular brick structure has been unearthed by archaeologists at Porpanaikottai
It is a Sangam-age site in Pudukkottai district.
Potsherds, comprising glazed ware, blackware, black and red ware, roof tiles, perforated ware and three pieces of rouletted ware, a distinctive type of decorated pottery, have also been found.
A hopscotch made of rouletted ware is a rare and important find.
A Sangam-age fort is believed to have existed here.
A habitation mound, spread over 1.26 hectares, is believed to have existed within the fort.