Madurai is a major tier II city in the Indian state of Tamil Nadu. It is the cultural capital of Tamil Nadu and the administrative headquarters of Madurai district, which is governed by the Madurai Municipal Corporation established on 1 November 1866. As of the 2011 census, it is the third largest metropolis in Tamil Nadu after Chennai and Coimbatore in terms of population and 27th largest urban agglomeration in India. Located on the banks of Vaigai River, Madurai has been a major settlement for two millennia and has a documented history of more than 2500 years. It is often referred to as "Thoongaa Nagaram", meaning "the city that never sleeps".