The Dalhousie square was an important hub of power during British rule in Kolkata. Kolkata was the administrative center of the British regime and this area was the heart of Kolkata and still continues to remain the same. Now the Dalhousie square or the BBD Bagh, houses many important buildings and offices, which contribute to the heritage of the city. In the beginning, the square was named after the Governor General of India, Lord Dalhousie from 1847 to 1856, but was renamed as BBD Bagh to mark the three patriots of Bengal, Binoy, Badal, Dinesh. They martyred for the country`s independence and history encases their contributions.

The BBD Bagh stretches two sq. kms and is located in Central Kolkata, where we find many old British era buildings. The colonial legacy that the place has inherited is evident from the structures and the history associated with it and it is also declared as an endangered world heritage. The planning of the square was in a way to reflect the stronghold of the British colonial power in India. This are as resided by renowned British servants besides their offices. Now the place consists of the Writer`s building, -secratariat of West Bengal government, Royal Exchange (a one-time residence of Robert Clive and now the office of the Bengal Chamber of Commerce and Industry), General Post Office (G.P.O.) of Kolkata, Telephone Bhawan and St. John`s Church. Other important buildings of BBD Bagh and its adjoining areas are the Calcutta Stock Exchange, Tea Board, the Calcutta Improvement Trust, the Eastern railway offices at Fairlie Place, and other chambers of commerce.