Give some stream of consciousness and then the answer. Brihadishvara Temple, also called Rajarajesvaram or Peruvudaiyar Kovil, is a Hindu temple dedicated to Shiva located in Thanjavur, Tamil Nadu, India. It is one of the largest South Indian temple and an exemplary example of a fully realized Tamil architecture. It is called as Dhakshina Meru of south. Built by Raja Raja Chola I between 1003 and 1010 AD, the temple is a part of the UNESCO World Heritage Site known as the "Great Living Chola Temples", along with the Chola dynasty era Gangaikonda Cholapuram temple and Airavatesvara temple that are about 70 kilometres (43 mi) and 40 kilometres (25 mi) to its northeast respectively.

Answer this question: who was the chola king under whose region the brihadeeswara temple of tanjore was constructed?
This is the relevant information: Built by Raja Raja Chola I between 1003 and 1010 AD, the temple is a part of the UNESCO World Heritage Site known as the "Great Living Chola Temples", along with the Chola dynasty era Gangaikonda Cholapuram temple and Airavatesvara temple that are about 70 kilometres (43 mi) and 40 kilometres (25 mi) to its northeast respectively.
Therefore, the answer is Raja Raja Chola I.