Rajaraja Chola ruled from 985 to 1014 C.E. and is widely regarded as the greatest ruler of the Chola Empire. By capturing the southern Indian kingdoms, he created the conditions for the Chola kingdom to grow into an empire, which eventually reached Kalinga (Orissa) in the northeast and Sri Lanka in the south. In numerous conflicts, he engaged in combat with the Chalukyas in the north and the Pandyas in the south. The Chola dynasty of Chalukya was established by Rajaraja's conquest of Vengi. He led the Chola invasion of Sri Lanka, which lasted for a century.

He unified income collection through methodical land surveys and streamlined the administrative structure by dividing the nation into several districts. By constructing the majestic Brihadisvara Temple in Thanjavur, he made it possible for his subjects to share in the wealth. His triumphs made possible the magnificent accomplishments of his son Rajendra Chola I, who brought the empire to its pinnacle of growth and expanded its conquest across international borders.

The Chola military was a proficient and disciplined fighting force in the Middle Ages. He spent the first several years establishing a potent army and getting ready for military campaigns, with Thanjavur serving as his capital. A formidable standing army and sizable fleet were established by Rajaraja Chola I, who was succeeded by his son Rajendra Chola I to an even greater extent. The Elephant Corps, Cavalry, and Infantry made up the army.  acquisition of Sri Lanka. Raja Raja Chola, the mighty, set his sights on Izham (Srilanka) after subduing most of South India. According to legend, Raja Raja the Great anchored the Chola flag and subdued the ferocious Singhalese monarch of Izhamandalam.  

A sense of identity and pride was fostered among the people of Raja Raja Chola's realm through his sponsorship of the arts, culture, and religion. He demonstrated his dedication to protecting and promoting his country's rich cultural legacy by helping to build the Brihadisvara Temple among other temples and monuments.

The temple is well-known for its imposing Vimana, a Hindu temple's tower that stands over the sanctum sanctorum. With a height of more than 60 meters, the Vimana of the Brahadeeswara Temple is among the tallest in the world. The weight of the granite dome on the Vimana is estimated to be 81.3 tons. It is thought that an earthen ramp was used to raise the dome into position, demonstrating the Chola dynasty's prowess in engineering.

Thus Raja Raja Chola is one of the most powerful kings of Chola Dynasty.