is a city in Tamil Nadu, and was formed into a municipal corporation in 1999, by merging three municipalities viz., Tirunelveli city, Palayamkottai and Melapalyam, and a few Panchayat areas[1]. Its the 6th largest city in Tamil Nadu, South India, and the district headquarters of Tirunelveli district. The city is considered to be one of the oldest in the Indian subcontinent, with a history that dates back to 1000 BC. Tirunelveli city is located on the west bank of the perennial river, Thamirabarani, whereas Palayamkottai is located on the right bank; for this reason, they are referred to as the "twin cities". Tirunelveli is also often called the "Halwa City" for its very famous sweet Halwa.