The above text courtesy from the wikipedia website.
Only this imposing entrance facade remains from this audience hall built in the Ali I period. The high central arch is flanked by arches that lead to narrow staircases to the upper storey. The far wall has three arched recesses and a row of smaller arches at the base. The Mahal and nearby palaces form the royal centre of Bijapur and are surrounded by a moat and citadel walls.
The above text courtesy from the website of kaladarshana.com
In my collection i have a vintage post card of Gagan Mahal, Bijapur.
This is my Gagan Mahal, Bijapur vintage post card.