Indian Overseas Bank (IOB) is a central public sector undertaking. It is under the ownership of the Ministry of Finance, Government of India. It is based in Tamil Nadu, India, with about 3,214 domestic branches, about 4 foreign branches and representative office. Founded in February 1937 by M. Ct. M. Chidambaram Chettyar with twin objectives of specialising in foreign exchange business and overseas banking, it has created various milestones in Indian Banking Sector. During the nationalisation, IOB was one of the 14 major banks taken over by the government of India. On 5 December 2021, IOB got Degidhan Award 2020–21 by Ministry of Electronics & Information Technology for achieving second highest percentage of digital payment transaction among public sector banks. As on 31 March 2022, IOB's total business stands at ₹417,960 crore (US$52 billion).

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.

Madurai ( MA-DHU-RYE, also US: MAH-də-RYE, Tamil: [mad̪uɾaɪ̯]) is a major city in the Indian state of Tamil Nadu. It is the cultural capital of Tamil Nadu and the administrative headquarters of Madurai District. As of the 2011 census, it was the third largest Urban agglomeration in Tamil Nadu after Chennai and Coimbatore and the 44th most populated city in India. Located on the banks of River Vaigai, 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 "Thoonga Nagaram", meaning "the city that never sleeps".Madurai is closely associated with the Tamil language. The third Tamil Sangam, a major congregation of Tamil scholars said to have been held in the city. The recorded history of the city goes back to the 3rd century BCE, being mentioned by Megasthenes, the Greek ambassador to the Maurya empire, and Kautilya, a minister of the Mauryan emperor Chandragupta Maurya. Signs of human settlements and Roman trade links dating back to 300 BCE are evident from excavations by Archeological Survey of India in Manalur. The city is believed to be of significant antiquity and has been ruled, at different times, by the Pandyas, Cholas, Madurai Sultanate, Vijayanagar Empire, Madurai Nayaks, Carnatic kingdom, and the British East India Company British Raj. The city has a number of historical monuments, with the Meenakshi Temple and the Thirumalai Nayak Palace being the most prominent. Madurai is an important industrial and educational hub in South Tamil Nadu. The city is home to various automobile, rubber, chemical and granite manufacturing industries.Madurai has important government educational institutes such as the Madurai Medical College, Homeopathic Medical College, Madurai Law College, Agricultural College and Research Institute. Madurai city is administered by a municipal corporation established in 1971 as per the Municipal Corporation Act. The city covers an area of 147.97 km2 (57.13 sq mi) and had a population of 1,470,755 in 2011. The city is also the seat of a bench of the Madras High Court. The Madurai Bench has been functioning since 2004.