Kovilvenni is a town near Needamangalam in the district of Thiruvarur.
Kovilvenni was under the Chola Kingdom during the ancient period.
The great battle of Venni took place between the Cholas and the Cheras here.
Following his defeat, the Chera dynasty king Uthiyan Cheralathan starved himself to death.
The battle is considered historical and dated approximately to 190 CE.