Rajarajesvaram or Peruvudaiyar Koyil, is a Hindu temple dedicated to Shiva located in Thanjavur, Tamil Nadu.
It follows Dravidian architecture.
It is called as Dhakshina Meru (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.
Built out of granite, the vimana tower above the sanctum is one of the tallest in South India.