The construction of the famous dome of the Ahsan Mazil , which is at the center of the palace , took a lot tedious planning . The square room on the ground floor was built with a round shape and brickworks were done around the corners . To give the room an octagonal shape , squinches were given around the roof corners . The eight corners of the octagon was slanted gradually to make the dome look like the bud of a lotus ( kumud kali ) . The peak of this dome is 27.13 m above the ground . Ahsan Manzil was severely damaged during the tornado that occurred on 7 April 1888 . the western block of Andermahal was completely demolished and later it was entirely rebuilt . The present day dome , which is situated on the top , was built during the time of reconstruction . This place was also damaged during the earthquake of 1897 but Nawab Khwaja Ahsanullah repaired the whole place again
earthquake of 1897
1897 Assam earthquake
Ahsan Manzil