Narasimhavarman I was also known as Mamalla, which means 'great wrestler'. He wanted to take avenge the defeat of his father at the hands of Chalukyan ruler Pulakesin II. His victory over Pulakesin II in the Battle of Manimangalam near Kanchi is mentioned in Kuram copper plates. The Pallava army under General Paranjothi pursued the retreating Chalukya army, entered Chalukya territory, captured and destroyed the capital city of Vatapi. Narasimhavarman I assumed the title 'Vatapikonda'. He regained the lost territory. Another notable achievement of Narasimhavarman I was his naval expedition to Sri Lanka. He restored the throne to his friend and Sri Lankan prince Manavarma.
During his reign, Hiuen Tsang visited the Pallava capital Kanchipuram. His description of Kanchi is vivid. He calls it a big and beautiful city, six miles in circumference. It had 100 Buddhist monasteries in which about 10,000 Buddhist monks lived. According to his account the people of Kanchi esteemed great learning and the Ghatika at Kanchi served as a great centre of learning. Narasimhavarman I was the founder of Mamallapuram and the monolithic rathas were erected during his reign.
After the decline of the Sangam Age in the Tamil country, the Kalabhra rule lasted for about 250 years. Thereafter, the Pallavas established their kingdom in Tondaimandalam with its capital at Kanchipuram. Their rule continued till Tondaimandalam was captured and annexed by the Imperial Cholas in the beginning of the tenth century A.D.
There are different views on the origin of the Pallavas. They were equated with the Parthians, the foreigners who ruled western India. Another view was that the Pallavas were a branch of the Brahmin royal dynasty of the Vakatakas of the Deccan. The third view relates the Pallavas with the descendents of the Chola prince and a Naga princess whose native was the island of Manipallavam. But these theories on the origin of the Pallavas were not supported by adequate evidences.
Therefore, the view that the Pallavas were the natives of Tondaimandalam itself was widely accepted by scholars. They are also identical with the Pulindas mentioned in the inscriptions of Asoka. When Tondaimandalam was conquered by the Satavahanas, the Pallavas became their feudatories. After the fall of the Satavahanas in the third century A.D., they became independent. The Pallavas issued their earlier inscriptions in Prakrit and Sanskrit because of their Satavahana connections, and also patronised Brahmanism.
The early Pallava rulers from 250 A.D. to 350 A.D. issued their charters in Prakrit. Important among them were Sivaskandavarman and Vijayaskandavarman. The second line of Pallava rulers who ruled between 350 A.D. and 550 A.D. issued their charters in Sanskrit. The most important ruler of this line was Vishnugopa who was defeated by Samudragupta during his South Indian expedition. The rulers of the third line who ruled from 575 A.D. to their ultimate fall in the ninth century issued their charters both in Sanskrit and Tamil. Simhavishnu was the first ruler of this line. He destroyed the Kalabhras and firmly established the Pallava rule in Tondaimandalam. He also defeated the Cholas and extended the Pallava territory up to the river Kaveri. Other great Pallava rulers of this line were Mahendravarman I, Narasimhavarman I, and Narasimhavarman II.