Chennai, formerly known as Madras, is the capital city of Tamil Nadu, the southernmost Indian state. It is the state's primate city both in area and population and is located on the Coromandel Coast of the Bay of Bengal. According to the 2011 Indian census, Chennai is the sixth-most populous city in India and forms the fourth-most populous urban agglomeration. Incorporated in 1866, the Greater Chennai Corporation is the oldest municipal corporation of India and the second oldest in the world after London.
Historically, Chennai and surroundings were part of the Chola, Pandya, Pallava and Vijayanagara kingdoms for many centuries. The coastal land, which then contained the fishing village Madrasapattinam, was purchased by the British East India Company from the Nayak ruler Damarla Chennapa Nayaka, in the 17th century.
Wikipedia https://en.wikipedia.org/wiki/Chennai
Coordinates 13°5'1.298" N 80°16'12.669" E