Northbrook Hall, Town hall and library in Old Dhaka, Bangladesh

Northbrook Hall, locally called Lalkuthi, is a red-painted Indo-Saracenic building on Farashgonj Road in Old Dhaka. Its north side has a semicircular horseshoe-arched entrance, four octagonal minarets, pinnacles and an ornamental parapet; the domes follow Mughal style while doors and windows are European in detail. A library added in 1882 stands at the rear.

Northbrook Hall was built as a town hall after Lord Northbrook's 1874 visit to Dhaka; the Bhowal Raja Rajendra Narayan Roy Chowdhury donated 10,000 taka, and construction finished in late 1879. The Dhaka Commissioner inaugurated it on 25 May 1880, with Nawab Abdul Ghani's personal orchestra performing. A public library was added on 8 February 1882, opening in 1887 with books shipped from Britain.

Locals call the building Lalkuthi, "the Red House", after the red paint of its original exterior. The name Northbrook Hall honours Lord Northbrook, Viceroy of India from 1872 to 1876, who visited Dhaka in 1874. On 7 February 1926 the poet Rabindranath Tagore was honoured here by Dhaka Municipality and the People's Association.

Northbrook Hall stands on Farashgonj Road on the north bank of the Buriganga in Old Dhaka, under Dhaka South City Corporation. A pentagram fountain in front of the north entrance and an education office built beside the hall in 1998 block the view, and shops on the south side hide the riverfront. The building is listed as a protected monument by the Department of Archaeology.

The Bengali name Lalkuthi means "red building", from the red wash the hall carried in its early years. The sources also note that the hall looked different from the south and the north, so a first-time visitor could not easily tell it was the same structure.