The RBI Museum

Built in 1787, St John's Church is the third-oldest church in Kolkata and the oldest Anglican Church in the city. Its compound contains several graves including that of Job Charnock.

Notable for its imposing high domed roof (rising over 220 ft) and tall Ionic-Corinthian pillars. It was built in 1868, at the site of the old Fort William, and has remained an important landmark of the city ever since.

A three-storey Italianate structure, consisting of floors covered by marble and Chunar sandstone. During its use as a currency office, the central hall contained the exchange counters for banknotes, gold, silver, and small change. It was converted into a modern art gallery on 11 January 2020.

A philatelic museum beside the GPO, housed in the ground floor of a red building. It is dedicated to the history of postal services and the contributions of runners, who delivered mail from one place to another. The museum has a collection of various knives that the runners carried for self-defence. It also has a wide collection of stamps and letters, along with a signature of Rabindranath Tagore on his Santiniketan passbook. There are also signatures of CV Raman and portraits of many other individuals who once worked for the Indian postal service.

A neoclassical heritage building, with its ground floor housing the Asiatic Society's rare foreign journals and manuscripts section, while the first floor houses offices, exhibition galleries, and a sales counter of the Archaeological Survey of India (ASI). It preserves the rich legacy of music, painting, theatre, and cinema of Bengal. There are photos and hand-drawn posters of old Calcutta on the walls along the stairs. The exhibition gallery features old images of docks, College Street, Durga idols, etc. It also has dedicated corners for old Bengali films, theatres, and instruments.