Ahsan Manzil was the official residential palace and seat of the Dhaka Nawab Family. It is situated on the banks of the Buriganga River in Bangladesh. The palace became the Bangladesh National Museum on 20 September 1992. It is constructed in the Indo-Saracenic Revival architecture.
Ahsan Manzil has now been converted into a museum and a popular tourist attraction of old Dhaka.Ahsan Manzil is one of the most significant architectural monuments of Bangladesh. Established on a raised platform of 1 metre, the two-storied palace measures 125.4 m by 28.75 m. The height of the ground floor is 5 metres and that of the first floor 5.8 metres. There are porticos the height of the ground floor, both on the northern and southern sides of the palace. An open spacious stairway comes down from the southern portico, extending onto the bank of the river through the front garden. There was once a fountain in the garden in front of the stairs, that does not exist today. The spacious north and south verandas of both the floors rest on semicircular arches. The verandas and rooms are covered with marble.
To construct the dome of Ahsan Manzil, the square room on the ground floor was given a round shape with brickwork in the corners. The room was then given an octagonal shape near the roof by squinches. This octagonal shape took the form of the drum of the dome. Finally, the kumud kali (buds of lotus) shaped dome was constructed by gradually slanting the eight corners to the peak. The dome is 27.13 m above the ground.