The Khas Mahal or the private house inside the Red Fort or Lal Qila comprises of three parts. The set of three rooms facing the Diwan-I-Khas is called the Tasbih-Khana or the chamber for telling beads, used for private worship by the emperor.

The three rooms behind this chamber are known as Khwabgah or the sleeping chamber. To its south there is a long hall known either as Tosh-Khana (‘robe chamber’) or Baithak (‘sitting room’).

The Red Fort in Delhi is a remarkable example of the mature Mughal style developed under Shah Jehan’s patronage. It  was built between Delhi city and the river Yamuna and was modelled on the Agra Fort.