Its high fortified walls and occasional bastions were encroached upon, destruction, defacement of different structures and changes in internal spaces, had put the fort in a sorry state.
The two-storied diwan block was partly damaged; bathhouse, niches were filled in, and decorative panels were mostly plastered over.
The DOA accomplished a good job in restoring the structure and converting it into a museum in the first place, but the pinkish finish on the exterior, rather than the original lustrous white, fueled debates and controversies.
The elegance of its interior bespeaks the patron's wealth.
The mosque's interior is divided into three bays by two lateral cusped arches supported by stone piers embedded in the east and west walls.
Yet the Directorate restored the do-chala roof on the veranda at the south of the tomb and the decorative features like engaged corner turrets.
This appears to be the first use of lateral cusped arches in a Bengali mosque's interior, and was doubtless inspired by imperial mughal architecture.
The central Mihrab, particularly noteworthy, is highly ornamented with Cyprus-filled kanjuras, ornate arabesque plastic relief in the spandrels, a cusped arch, and engaged colonettes standing on bulbous floral bases.
Due east of the mosque is the small, square, single-domed tomb with engaged turrets at each corner.
Attached to the Southside was a low rectangular chamber with a do-chala roof, now collapsed.
While the purpose of this room is not clear, it perhaps served as a prototype for the more symmetrical tomb of Khwaja Anwar-i Shahid in Burdwan.
It reconstructed the brick podium and provided adequate provision for ablution, plumbing, and sanitation services.
The front façade of the mosque has three arched openings within four slender columns.
Historically in Mughal architecture the standard architectural design was having two columns on the east façade of the mosque, but this mosque has four.
It also has four corner turrets, ribbed and engaged.
Earlier in  it also has four corner turrets, ribbed and engaged.
In a way the other two mosques built slightly later than this one bear similar features, but in an improved form.
It is something that we now identify as a distinct Mughal style in Bengal.

It also worked on other structures, too.
It shied away from proper excavation and documentation of the intricate water supply system a network of terracotta pipes, an aqueduct, a water reservoir and several fountains, until recently.
Its high fortified walls and occasional bastions were encroached upon, destruction, defacement of different structures and changes in internal spaces, had put the fort in a sorry state. The two-storied diwan block was partly damaged; bathhouse, niches were filled in, and decorative panels were mostly plastered over. The DOA accomplished a good job in restoring the structure and converting it into a museum in the first place, but the pinkish finish on the exterior, rather than the original lustrous white, fueled debates and controversies. The elegance of its interior bespeaks the patron's wealth. The mosque's interior is divided into three bays by two lateral cusped arches supported by stone piers embedded in the east and west walls. Yet the Directorate restored the do-chala roof on the veranda at the south of the tomb and the decorative features like engaged corner turrets. This appears to be the first use of lateral cusped arches in a Bengali mosque's interior, and was doubtless inspired by imperial mughal architecture. The central Mihrab, particularly noteworthy, is highly ornamented with Cyprus-filled kanjuras, ornate arabesque plastic relief in the spandrels, a cusped arch, and engaged colonettes standing on bulbous floral bases. Due east of the mosque is the small, square, single-domed tomb with engaged turrets at each corner. Attached to the Southside was a low rectangular chamber with a do-chala roof, now collapsed. While the purpose of this room is not clear, it perhaps served as a prototype for the more symmetrical tomb of Khwaja Anwar-i Shahid in Burdwan. It reconstructed the brick podium and provided adequate provision for ablution, plumbing, and sanitation services. The front façade of the mosque has three arched openings within four slender columns. Historically in Mughal architecture the standard architectural design was having two columns on the east façade of the mosque, but this mosque has four. It also has four corner turrets, ribbed and engaged. Earlier in  it also has four corner turrets, ribbed and engaged. In a way the other two mosques built slightly later than this one bear similar features, but in an improved form. It is something that we now identify as a distinct Mughal style in Bengal.
It also worked on other structures, too. It shied away from proper excavation and documentation of the intricate water supply system a network of terracotta pipes, an aqueduct, a water reservoir and several fountains, until recently.
Shahbaz Khan Mosque