Ruplal House (formerly known as Aratoon House) is a 19th-century mansion in Farashganj area in Dhaka, Bangladesh. It was built on the northern bank of the Buriganga River, beside the Buckland Dam. The house was built in 1825 by an Armenian businessman Stephen Aratoon. It was later bought by two merchants, Ruplal Das and his brother Raghunath Das, in 1840. Later, an architect firm of Calcutta, Martin Company, re-constructed this building. Ruplal House first came into limelight in 1886 when Ruplal Das threw a ball dance party in the honor of the Viceroy of India Lord Dufferin.[2] After the partition of India in 1947, the family of Ruplal Das left for Kolkata.[2] In 1962, through a formal deed of exchange, Siddick Jamall bought the house. Divided into two unequal blocks in slightly different styles, it is a two-storeyed edifice. It presents a Grand River front, about 9144 m long. It replicated Greek Doric column and there used to be a huge clock at the top of the building. In the earthquake of 1897.[3] Its ground plan follows the shape of the letter 'E', with three arms extending towards the north or the city side, of which the middle arm projects about 1830 m. It accommodates a grand portico carried on a series of lofty semi-Corinthian fluted columns, and surmounted by a triangular pediment, characteristic of Renaissance architecture.

The two blocks include, in two floors, over fifty rooms of various sizes and of them the central hall on the upper floor of the more impressive western wing was an elegantly decorated dance hall with a wooden floor. On the north and south two broad verandas run the entire length of the block and are supported on either round semi-Corinthian columns or rectangular brick pillars with segmented or trefoil arches above. Ruplal house has three distinct blocks of different architectural style; these blocks were separated in the ground floor, but related at the upper floor by arch way. Those three blocks were:[4]

Ruplal block [western wing- around twenty five thousand square ft.] Raghunath block [eastern wing- around twelve thousand square ft.] Central block [approximately nine thousand square ft.] Architectural Features: Ruplal Block Ruplal block was designed in the Neo-classical style. This grand wing was square in plan with a square central courtyard. The lighter plain columns give the court sense of light and proportions. The rooms were arranged around this central courtyard in order to give privacy. Its main entry is from the northern portico with a triangular pediment over fluted columns with Corinthian capitals, which emphasizes the entry and its secondary entry from the front court through the series of archways which is also inviting. Service block lowering height is slightly detached from the main block.

Structural Features: Ruplal Block Foundation: load bearing brick masonry foundation is used as the superstructure without using any reinforcement. There is no crack or sag seen in the foundation. Plinth is 2’ high from the ground level.

Walls: Load bearing 25” thick. Brick masonry is layered in walls. Lime concrete is used as the mortar and plastering materials. Columns: Three types of columns; Neo-Corinthian, circular, squares columns. Arch: Serve as lintels made of bricks over the doors, windows, and also on the circulation passages. Beams: Steel I beam. For wide span double steel beams are used. Steel I beam of Size- 3”x6”, 4”x8” and 6”x12. Wooden beams: Size 3”x3” Floor: 11” thick layered floor of Red oxide, Brick masonry Tiles, Lime Concrete. Stair –case: Wooden staircases. One stair is partly reinforced. Wooden stairs are used with iron joists. Material: Bricks are used as the main building material. They are varied in size and shape. Brick tiles are used in the cornice. Plaster: Lime concrete. No blister is seen in the walls and columns because of using glue. Finish materials: Marble tiles, Terrazzo, Red oxide, colored tinted glass.

Architectural Features: Raghunath Block This block has different architectural style which lies in the eastern part of the complex.