Built like a fort, this huge and elegant building is also called the Asafai Imambara. Nabab Asaf-ud-Daulla built this building in a famine relief program in 1784. The structure took six years to be completed. Just as we enter the building there is a hall almost fifty meters long and 17 meters wide. The architecture of this 15 meter high room is very unique and unparalleled. Here the Nawabs used to hold their " Darbar " or their public hearings. It is said that this hall is the worlds largest arched room without any pillars. The upper part of this building is in shape of honey bees comb and is surrounded by the famous "Bhul Bhulliya". This has got numerous steps and there are 489 doorless galleries which are similar in appearance. People get lost in these galleries. The largest of these mazed rooms and galleries has a speciality that even when a paper is torn on one of the end sit is heard on the other end.
In the courtyard of Bara Imambara is the Sahi Masjid which stands tall on a platform, non Muslims are not allowed here. Just besides the Sahi Masjid is the bottomless well. The BaraImambara also has the tomb of Asaf-Ud-Daulla."