The Graffiti marks “resembling geometric symbols” were among the potsherds discovered during the archaeological excavations at Perumbalai in Dharmapuri district.
The lower-most level as site is dated back to the 6th Century BCE.
By the shapes and size of the pottery, it belongs to the Iron Age.
Perumbalai is located on the bank of the Nagavathi (ancient Palar), one of the tributaries of Cauvery River.
Kongumandala Satakam, a 13th Century literary work by Karmegakavirayar of Vijayamangalam, is referred to Perumbalai as the northern boundary of the Kongu region.