The Chola fresco paintings were discovered in 1931 within the circumambulatory passage of the Brihadisvara Temple at Thanjavur, Tamil Nadu, and are the first Chola specimens discovered. Researchers have discovered the technique used in these frescoes. A smooth batter of limestone mixture is applied over the stones, which took two to three days to set. Within that short span, such large paintings were painted with natural organic pigments. During the Nayak period the Chola paintings were painted over. The Chola frescoes lying underneath have an ardent spirit of saivism is expressed in them. They probably synchronised with the completion of the temple by Rajaraja Cholan the Great.