Chengalpattu, previously known as Chingleput, is a city and the headquarters of Chengalpattu district of the state Tamil Nadu, India. The town is located near to the industrial and IT hub. It is the headquarters of the district and is away from the state capital, Chennai on the National Highway 45. It is an important commercial center. It has a medical college and other colleges affiliated with the University of Madras. Etymology The city is believed to have been named after a lily called 'chenkazhuneer poo' (செங்கழுநீர் பூ) which is found aplenty in the region. It is near the banks of Palar River about 56 km southwest of Chennai city (Madras) and thus Chengapattu is called the "Gateway of Chennai". History Chengalpattu dates from the early Chola dynasty of the 2nd century BCE. Chengalpattu was formerly a capital of the kings of Vijayanagara, after their defeat by the Deccan sultanates at Battle of Talikota in 1565. The fortress at Chengalpattu, built by the Vijayanagara kings in the 16th century, was of strategic importance, owing to its swampy surroundings and the lake that flanked its side. In 1639 a local governor or nayak, subject to these kings, granted a piece of coastal land to the British East India Company where Fort St George now stands, which became the nucleus of the city of Madras. Chengalpattu was taken by the French in 1751 and was retaken in 1752 by Robert Clive, after which it proved of great strategic advantage to the British, especially when Lally failed to capture the fortress in his advance on Madras. During the wars of the British with Hyder Ali of Mysore, it withstood his assault and afforded a refuge to the nearby residents. In 1780, after the defeat of Colonel W Baillie, the army of Sir Hector Munro took refuge there. By 1900 the town was noted for its manufacture of pottery and was a local market center, especially of the rice trade. The surrounding district was home to cotton and silk weaving, indigo dyeing, tanneries, and a cigar factory, and extensive salt manufacturing took place along the coast. The city was part of the Chengalpattu (Lok Sabha constituency) that exist from 1952 to 2004 Lok Sabha elections. Since 2009 it is a part of the Kancheepuram (Lok Sabha constituency). Chengalpattu Municipality was extended for Greater Municipality on 24 August 2021 by annexing the villages of Anjur,