[4] Lalbagh Fort was built as the official residence of the governor of the Mughal province of Bengal, Bihar and Orissa.

[8] The Mughal prince Muhammad Azam Shah, third son of Aurangzeb started the work of the fort in 1678 during his vice-royalty in Bengal.

[10] For long the fort was considered to be a combination of three buildings (the mosque, the tomb of Bibi Pari and the Diwan-i-Aam), with two gateways and a portion of the partly damaged fortification wall.

On the north of the south fortification wall were the utility buildings, stable, administration block, and its western part accommodated a beautiful roof-garden with arrangements for fountains and a water reservoir.

The residential part was located on the east of the west fortification wall, mainly to the southwest of the mosque.

The central area of the fort is occupied by three buildings—the Diwan-i-Aam and the hammam on its east, the mosque on the west and the Tomb of Pari Bibi in between the two—in one line, but not at an equal distance.

A water channel with fountains at regular intervals connects the three buildings from east to west and north to south.

[3] Diwan-i-Aam is a two-story residence of the Mughal governor of Bengal located on the east side of the complex.

[13] The discovery of black spots in the underground room proved that fire had been used for the purpose of heating the water for the Hammamkhana.

From the report of the Governor of English Factory, it was learned that Shaista Khan used to live in this room and some Europeans were kept in custody here.

It contains the remains of Pori Bibi, covered by a false octagonal dome and wrapped by a brass plate.

Among all the historical stories and debates, it is widely believed that Lalbagh Fort stands as a monument of the unfulfilled dreams of Prince Muhammad Azam Shah, beloved son of Emperor Aurangzeb.

In the mid-17th century, he was serving as the Viceroy of Bengal and began the construction of the impressive Lalbagh Fort complex.

Before the construction was finished, Prince Azam was called back to his father to assist in the war against the Marathas.

Legend says after the Mughal prince departed, Shaista Khan continued with building the project, but upon the untimely death of his much-loved daughter Iran-Dukht, warmly known as Pari Bibi, the construction was stopped.

[16] Archeologists discovered the continuity of the main fort walls eastward below Shaishta Khan Road.

They opined that the present area of Qilla represents half the portion as planned by Prince Azam Khan.

The other half to the east—likely planned for administrative purposes (Girde Qilla area)—were incomplete or extinct long ago.