Tamil Nadu (; Tamil: [ˈtamiɻ ˈnaːɽɯ] (listen), abbr. TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language—one of the longest surviving classical languages in the world—is widely spoken in the state and serves as its official language. The state lies in the southernmost part of the Indian peninsula, and is bordered by the Indian union territory of Puducherry and the states of Kerala, Karnataka, and Andhra Pradesh, as well as an international maritime border with Sri Lanka. It is bounded by the Western Ghats in the west, the Eastern Ghats in the north, the Bay of Bengal in the east, the Gulf of Mannar and Palk Strait to the south-east, and the Indian Ocean in the south. The at-large Tamilakam region that has been inhabited by Tamils was under several regimes, such as the Sangam era rulers of the Chera, Chola, and Pandya clans, the Pallava dynasty, and the later Vijayanagara Empire, all of which shaped the state's cuisine, culture, and architecture. After the fall of the Kingdom of Mysore, the British colonised the region and administered it as part of the Madras Presidency, headquartered at the city of Madras, now known as Chennai. After India's Independence in 1947, the Madras State came into existence, whose borders were linguistically redrawn by the States Reorganisation Act, 1956, losing territory to Kerala, Karnataka and Andhra Pradesh. The state was renamed as Tamil Nadu in 1969. It is home to a number of historic buildings, multi-religious pilgrimage sites, hill stations and three World Heritage Sites.The economy of Tamil Nadu is the second-largest in India, with a gross state domestic product (GSDP) of ₹24.85 lakh crore (US$310 billion) and has the country's 11th-highest GSDP per capita of ₹225,106 (US$2,800). It ranks 11th among all Indian states in human development index. Tamil Nadu is the most urbanised state in India, and one of the most industrialised states; the manufacturing sector accounts for more than one-third of the state's GDP. Its tourism industry is the largest among the Indian states. The Tamil film industry plays an influential role in the state's popular culture.

Tirunelveli (Tamil: [tiɾɯnelʋeːli] (listen)), also known as Nellai and historically (during British rule) as Tinnevelly, is a major city in the Indian state of Tamil Nadu. It is the administrative headquarters of the Tirunelveli District. It is the sixth-largest municipal corporation in the state after Chennai, Coimbatore, Madurai, Tiruchirappalli and Salem. Tirunelveli is located 624 km (388 mi) southwest of the state capital Chennai, 58 km (36 mi) away from Thoothukudi, and 73 km (45 mi) from Kanyakumari. The downtown is located on the west bank of the Thamirabarani River; its twin Palayamkottai is on the east bank. Palayamkottai is called the Oxford of South India as it is a hub of many schools and colleges. It boasts several important government offices. Tirunelveli is an ancient city, recorded to be more than two millennia old. It has been ruled at different times by the Early Pandyas, the Cheras, the Medieval Cholas and Later Cholas, the later Pandyas, the Vijayanagara Empire and the British. The Polygar War, involving Palaiyakkarars led by Veerapandiya Kattabomman and forces of the British East India Company, was waged on the city's outskirts from 1797 to 1801. Tirunelveli is administered by the Municipal Corporation, established on 1 June 1994 by the Municipal Corporation Act. The city covers an area of 189.9 km2 (73.3 sq mi), and holds a population of 473,637 in 2011. The total population after the inclusion of other municipalities is 968,984. Tirunelveli is well-connected by road and rail with the rest of Tamil Nadu and India. The nearest domestic airport is Thoothukudi Airport. The nearest international airports are Madurai International Airport and Thiruvananthapuram International Airport. The nearest seaport is Thoothukudi Port. Industries in Tirunelveli include administrative services, agricultural trading, tourism, banking, agricultural machinery, information technology and educational services. The city is an educational hub of southern India, with institutions such as Anna University Regional Campus – Tirunelveli, Tirunelveli Medical College, The Tirunelveli Veterinary College and Research Institution, Tirunelveli Law College, the Government College of Engineering, Manonmaniam Sundaranar University and much more. Tirunelveli has a number of historical monuments, with the Nellaiappar Temple being the most prominent. The city is also renowned throughout the state for a sweet called 'Irutu kadai halwa'.