The Writers' Buildings or Mahakaran, often shortened to just Writers', was the official secretariat building of the state government of West Bengal in Kolkata, India. The 150-metre long building covers the entire northern stretch of the Lal Dighi or Red Lake at the centre of historic B.B.D. Bagh, long considered as the administrative and business hub of the city. As a heritage building, it remains at a central place in Bengal's politics as a witness to Bengal's transformation and Indian independence movement.

It originally served as the principal administrative office for writers (junior clerks) of the British East India Company (EIC). Designed by Thomas Lyon in 1777, the Writers' Building has gone through a long series of extensions over the centuries. Since India's independence in 1947, it housed the office of the Chief Minister of West Bengal, cabinet ministers and other senior officials, until 4 October 2013, when a major restoration of the building was announced. The majority of government departments were subsequently moved out to a new re-purposed building named Nabanna in Howrah on a temporary basis.

The building has been called a mini-township of sorts with a built-up area of around 550,000 square feet. Before the shifting of the state secretariat, the building housed 34 departments of the state government, and served as the office for approximately 6,000 employees. As of October 2020,^[update] the renovation of the building continues.

The Writers' Building was designed by Thomas Lyon in 1777 for the EIC, which wanted to consolidate its trading operations in India and centralize the tax operations the EIC undertook in Bengal Subah. Over time, as British mercantile interest in India grew and the EIC defeated the Nawabs of Bengal, it was re-purposed as the effective headquarters of the EIC and later the entire British Raj in the Indian subcontinent. For more than 200 years the building served as the centre of British power and claims, as the seat of government of the Bengal Presidency and later the Province of Bengal. In the early part of the twentieth century, the building was the site of agitations, violence and assassination attempts during the Indian independence movement. Since India's independence in 1947, it has served as the state secretariat and has been the location of turbulent politics, mob violence and police brutality. It has also become a popular metonym for the government of West Bengal, and especially the unbroken 34-year long Left Front rule in the state.

The building has also played a fundamental part in shaping the history of the immediate region, as the village of Kalikata became British Calcutta and finally Kolkata. From its conception, the building was designed to become the focal administrative and business hub of the city emerging around it and was thus built close to existing infrastructure owned by the EIC. It was constructed on parts of the same parcel of land where the original Fort William, the EICs primary military stronghold in Bengal, stood until 1756. It also marked the centre of the 'White Town', populated primarily by English merchants, officers and EIC functionaries which was kept separate from the 'Black Town' populated primarily by the native landowners and businessmen.

1777-1780: Construction The site of the demolished St Anne's church and the adjoining plot were granted to Thomas Lyon, after whom the road behind Writers Building - Lyons Range - is named, to construct buildings to accommodate the junior servants of the East India Company called "writers". Lyon may have been a carpenter earlier in England but had established himself as an architect in Kolkata at the time, and completed the construction acting on behalf of Richard Barwell, member of the Supreme Council of Bengal and himself an ex-writer for EIC. Warren Hastings, the then governor of Governor-General of the Presidency of Fort William presided over the project and presumably was the one who commissioned it. Writers' Building was the first three-storey building in Kolkata. The main block, with a ground coverage of 37850 Square Feet was completed in 1780. It occupied one side of what was then called Tank Square (Dalhousie Square). It was built on a purely functional premise, shunning decorations for a straight facade and enclosure style compound in the back. The building initially opened with 19 residential quarters, each with three sets of windows, and was counted as a bit of an eyesore by the erstwhile English residents.

1800: College Fort William College, opened to train writers in Oriental languages, later moved to this building. Over the next 20 years, structural changes were made, including a new hostel for 32 students and an exam hall (which still exist), a lecture hall, four libraries and rooms to teach Hindi and Persian.

1821: facade created A 128 ft-long verandah with Ionic columns, each 32 ft high, were added on the first and second floors.