The construction of the palace was begun in 1859 and completed in 1872. Abdul Ghani named it Ahsan Manzil after his son Khwaja ahsanullah. At that time the newly built palace was known as Rang Mahal and the earlier one was called Andar Mahal. Ahsan Manzil was pertly damage by a terrible tornado On April 7, 1888, particularly the Andar Mahal of the palace. Nawab Ahsanullah rebuilt the Andar Mahal and repaired the Rang Mahal using good quality bricks that were brought from Raniganj. The exquisite dome of the present Rang Mahal was interposed. Ahsan Manzilwas badly damaged again by the earthquake of 12 June 1897.
