Diwan-i-Khas Diwan-i-Khas or Hall of Private Audience is one of the complimentary testimonies in Agra that were used by the emperor for the reception of important guests such as kings. It basically used for ambassadors and nobles in private in order to deal with imperative affairs of the state. It was built in 1635 consisting two halls and the interior hall that was famed as Tambi khana. There is a flat wooden flat ceiling in Diwan-i-Khas that was covered with gold and silver leaves to reproduce the rays of the sun. There is airy opened Open hall on three sides in which one can enter into it through five arched openings supported on double columns.
As similar to other exceptional architectural example of Shah Jehan's time, it had no chhatris over the parapet. According to the Persian inscription inside the interior hall, it was designed in black stone and dated 1636-37. The rooms were very attractive as it were considered the highest heaven. The chambers were generously ornamented with highly refined engrave work in floral patterns on the borders of the dados and exquisite carvings in the middle in relief to present the work in the best architecture designs.