Patna / ˈ p æ t n ə, ˈ p ʌ t-/ (), also known as Pataliputra is the capital and largest city of the state of Bihar in India. Patna is the second-largest city in Eastern India after Kolkata. [page needed] It had an estimated city population of 1.68 million in 2011, making it the 19th largest city in India.With over 2 million people, its urban agglomeration is the 18th largest in India.