Kolkata isn`t an ancient city like Delhi,with its impressive relics of the past.In fact it`s largely a British creation that dates back to 300 years.It was the capital of British India untill the beginning of last century.Kolkata grew steadily until 1756,when Siraj-ud-daula ,the nawab of Murshidabad,attacked the town.Most of the British inhibitants escaped,but those captured were packed into an underground celler where,during the night,most of them suffocated in what became as 'the black hole of Calcutta'.