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.

Thrissur (Malayalam: [t̪r̥iʃːuːr] (listen)), formerly Trichur, also known by its historical name Thrissivaperur, is a city and the headquarters of the Thrissur district in Kerala, India. It is the third largest urban agglomeration in Kerala after Kochi and Kozhikode, and the 21st largest in India. The city is built around a 65-acre (26 ha) hillock called the Thekkinkaadu Maidaanam which seats a large Hindu Shiva Temple. It is located central of the state, and 304 kilometres (189 mi) north-west of the state's capital city, Thiruvananthapuram. Thrissur was once the capital of the Kingdom of Cochin, and was a point of contact for the Assyrians, Greeks, Persians, Arabs, Romans, Portuguese, Dutch and English. Thrissur is also known as the Cultural Capital of Kerala because of its cultural, spiritual and religious leanings throughout history. The city centre contains the Kerala Sangeetha Nadaka Academy, Kerala Lalithakala Akademi and Kerala Sahitya Academy. The city hosts the Thrissur Pooram festival, the most colourful and spectacular temple festival in Kerala. The festival is held at the Thekkinkadu Maidan in April or May, in the Malayalam month 'medam'.Religion is important and varied in Thrissur. The city has historically been a centre of Hindu scholarship, and Christianity, Islam and Judaism are believed to have entered the Indian subcontinent through Thrissur and its surrounding areas. Thrissur has a large number of well-known temples including the Vadakkumnathan temple, Thiruvambadi Sri Krishna Temple, and Paramekkavu temple. There are three major Catholic churches, the St. Antony's Syro-Malabar Catholic Forane, Our Lady of Lourdes Syro-Malabar Catholic Metropolitan Cathedral and Our Lady of Dolours Syro-Malabar Catholic Basilica, the largest Christian church in India. India's first mosque, Cheraman Juma Masjid, is believed to have been constructed in 629 CE.The city is the headquarters of four major scheduled banks, South Indian Bank Ltd, Catholic Syrian Bank, Dhanalakshmi Bank and ESAF Small Finance Bank as well as several chit funds. The city is also a big centre for silks and gold jewellery. Thrissur attracts the largest number of domestic tourists in Kerala.Apart from being the cultural nerve centre of Kerala, it is also a major academic hub and is home to several educational institutions including the Kerala Kalamandalam, Kerala Agricultural University, Kerala University of Health Sciences, College of Veterinary and Animal Sciences, Sree Kerala Varma College, St Thomas College, Jawahar Bal Bhavan Thrissur, Kerala Institute of Local Administration, Kerala Forest Research Institute, Kerala Police Academy, Police Dog Training Centre, Kerala Fire and Rescue Services Academy, Excise Academy and Research Centre, Government College Of Music And Performing Arts, Government College of Fine Arts, Government Law College, Government Engineering College and Government Medical College.