Prime Minister Narendra Modi is all set to preside over the Aadi Thiruvathirai festival on Sunday, to mark the birth anniversary of the iconic Chola king Rajendra Chola-I. The event also commemorates 1,000 years of Rajendra Chola’s legendary maritime expedition to South East Asia and the commencement of the construction of the Gangaikonda Cholapuram temple, a magnificent example of Chola architecture.