Kolkata represents one of the four metropolitan cities of India. The city makes up the capital of the eastern state of India, West Bengal. The city, formerly designated as Calcutta, sway's rich cultural and demographic resources. The popularity of Kolkata, as one of the premier cities in India, reached its heights in the pre independence era. The city in a short span, about 400 years, has evolved into one of the major commercial areas and a great learning center in the sub continent.