Chennai (சென்னை in Tamil), formerly known as Madras, is the capital of the state of Tamil Nadu and is India's fourth largest metropolitan city. It is located on the Coromandel Coast of the Bay of Bengal. With an estimated population of 6.90 million (2005), the 368-year-old city is the 31st largest metropolitan area in the world.
The city is a large commercial and industrial centre, and is known for its cultural heritage and temple architecture. Chennai is the automobile capital of India, with around forty percent of the automobile industry having a base there and with 80% of the nation's vehicles being produced there. It has also become a major center for outsourced jobs from the Western world. The 12-kilometre long Marina Beach forms the city's east coast and is one of the longest beaches in the world. The city is known for its sport venues and hosts India's only ATP tennis event, the Chennai Open.