There is an arcaded facade of five bays, the western most multifoil arch of Shah Jahan's Mahal which is now closed by a glass screen. The room contains a massive wooden doorway known as Ghazni Gate, which measures 3.6 m. in length by 2.7 m. in width, which was brought by General Nott from Ghazni after the Afghan Expedition of 1842. It was wrongly considered to be the sandal wood gate of Somnath temple of Gujarat, believed to be taken by Sultan Mahmud of Ghazni in AD 1024-25.
The Gate most probably belonged to the mausoleum of Mahmud as is evident from an Arabic Kufic inscription invoking blessings for the Sultan Mahmud son of Subuktigin. The arch is designed purely on Islamic pattern. It was brought to Agra Fort and placed in Diwan-i-Am. But it was placed here in its present position at a later date.