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Madras State - Wikipedia
History of Chennai - Wikipedia
Madras Day: How Madras was founded and why it became Chennai
On the day ‘Madras State’ was renamed Tamil Nadu, a look-back …
Chennai | History, Population, Temples, Map, & Facts | Britannica
Tamil Nadu | History, Map, Population, Capital, & Government
Madras Presidency - Wikipedia
50 years on, a look at how Madras State became Tamil Nadu
Tamil Nadu summary | Britannica
Evolution of Madras to Chennai: Tracing its Historical Transition