 Complete the following phrase:  Raised on the foundations of a former small taziakhana, the building has undergone alterations. During the rule of the East India Company, it was repaired in 1807 and 1810. The original date of construction is still disputed, but Hussaini Dalan in its present form is attributed to Naib Nazim Nusrat Jung, who rebuilt the imambara in 1823. The present flat roof was rebuilt by Nawab of Dhaka Sir Khwaja Ahsanuallah Bahadur after the 