From Wikipedia

Raja Raja Cholan
The Great South Indian Tamil King

Rajaraja Chola I , popularly known as Raja Raja the Great, is one of the greatest emperors of the Tamil Chola Empire who ruled between 985 and 1014 CE. He established the Chola empire by conquering the kingdoms of southern India expanding the Chola Empire as far as Sri Lanka in the south, and Kalinga (Orissa) in the northeast. He fought many battles with the Chalukyas in the north and the Pandyas in the south. By conquering Vengi, Rajaraja laid the foundations for the Later Chola dynasty. He invaded Sri Lanka and started a century-long Chola occupation of the island.