Tamil Nadu one of India's largest electrical equipment manufacturing companies, has manufacturing plants at Tiruchirapalli and Ranipet. India's leading steel producer, the state-owned Steel Authority of India has a steel plant in Salem. Sterlite Industries has a copper smelter at Tuticorin and an aluminium plant in Mettur. The Chennai Petroleum Corporation is a state-owned oil and gas corporation headquartered in Chennai, and owns refineries at Manali and Panangudi. The state government owns the Tamil Nadu Newsprint and Papers, in Karur. Jointly with the Tata Group, the state owns the world's sixth largest manufacturer of watches, under the brand name of Titan, at
Architecture of Tamil Nadu Architecture of Tamil Nadu Tamil Nadu architecture that emerged thousands of years ago. The Pallavas ruled from AD (600–900) and their greatest constructed accomplishments are the single rock temples in Mahabalipuram and their capital Kanchipuram, now located in Tamil Nadu. Pallavas were pioneers of south Indian architecture. The greatest accomplishments of the Pallava architecture are the rock-cut temples at Mahabalipuram. There are excavated pillared halls and monolithic shrines known as rathas in Mahabalipuram. Mention must be made here of the Shore Temple constructed by Narasimhavarman II near Mahabalipuram which is a UNESCO World Heritage Site. The Chola kings ruled from