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^# Jana Gana Mana is the national anthem, while "Invocation to Tamil Mother" is the state song/anthem.
^† Established in 1773; Madras State was formed in 1950 and renamed as Tamil Nadu on 14 January 1969 
^^ Tamil is the official language of the state. English is declared as an additional official language for communication purposes. 
Tamil Nadu is home to many natural resources. In addition, its people have developed and continue classical arts, classical music, and classical literature. Historic buildings and religious sites include Hindu temples of Tamil architecture , hill stations , beach resorts, multi-religious pilgrimage sites, and eight UNESCO World Heritage Sites.  
A Neolithic stone celt (a hand-held axe) with the Indus script on it was discovered at Sembian-Kandiyur near Mayiladuthurai in Tamil Nadu. According to epigraphist Iravatham Mahadevan , this was the first datable artefact bearing the Indus script to be found in Tamil Nadu. Mahadevan claimed that the find was evidence of the use of the Harappan language , and therefore that the "Neolithic people of the Tamil country spoke a Tamil language ". The date of the celt was estimated at between 1500 BCE and 2000 BCE.