Vellore is a city and the administrative headquarters of Vellore District in the Indian state of Tamil Nadu. Located on the banks of the Palar River in the north-eastern part of Tamil Nadu, the city has been ruled, at different times, by the Pallavas, Medieval Cholas, Later Cholas, Vijayanagar Empire, Rashtrakutas, Carnatic kingdom and the British. The city has four zones covering an area of 87.915 km2 and has a population of 423,425 based on the 2001 census. It is located about 135 kilometres (84 mi) west of Chennai and about 210 kilometres (130 mi) east of Bangalore. Vellore is administered by Vellore Municipal Corporation under a mayor. It is a part of Vellore and Vellore.