BBD Bagh and Lal Dighi

BBD Bagh and Lal Dighi is the historic central square and tank in Kolkata, West Bengal, formerly known as Dalhousie Square. Located in the city's central business district, it centers around the 25-acre Lal Dighi tank. Surrounded by heritage colonial buildings such as Writers' Building and the General Post Office, it served as the administrative heart of British India and is now a heritage precinct and public open space.

Visitors can expect a large open public square centered on the rectangular Lal Dighi tank with fenced water body, walkways and green edges. The square is surrounded by heritage government buildings including Writers' Building, GPO, Raj Bhavan and St. John's Church in the vicinity. The area is a busy office district on weekdays with pedestrian paths, roadways, and open viewing points for photography and heritage walks. No boating is available on the tank.

The square was developed as Tank Square and later Dalhousie Square during the British period as the administrative and commercial centre of Calcutta, capital of British India until 1911. Lal Dighi is believed to predate British settlement and was developed as a central reservoir. The square was renamed BBD Bagh after freedom fighters Benoy, Badal and Dinesh. Surrounding buildings such as Writers' Building (1777), GPO (1868) and other colonial structures reflect its historic administrative role.

BBD Bagh is the heritage and administrative heart of Kolkata, representing colonial-era urban planning and architecture. It remains a central business district and a focal point for heritage conservation, with several listed heritage buildings and churches around Lal Dighi forming an important cultural precinct for visitors.