distance southwest of the Chauburji-Masjid is a double-storeyed
dilapidated rubble-built structure, now falling within the compound of the
Hindu Rao Hospital, with a baoli in its neighbourhood.
Among its surviving remains exist two narrow chambers giving access from the east and west, with other rooms on the north and south. There are two rooms on the second storey with openings on the east and minhrabs in the western wall, with pious exclamations incised above them on plaster. They appear to have been used as a mosque.
In the northern apartment a cenotaph lying east to west, commemorates, according to tradition, a saint who used this room as his 'chillagah' or worshipping place but disappeared at last mysteriously, 'ghaib', from which the monument has derived its present name meaning the 'vanished saint'.
The floor and the roof of the southern apartment are pierced by a hole, covered by a hollow masonry cylinder. Its purpose is not known, but it is believed to have been used for astronomical observations and may have some connection with the description of the place as Kushk-i-Jahan-Numa (world-showing palace) found in contemporary accounts.
The structure was built by Feroze Shah Tughluq and forms part either of his Kushk-i-Shikar (hunting palace) or Kushk-i-Jahan-Numa. Sharf-ud-Din Ali Yazdi mentions that Timur visited Feroze Shah's Palace called "Jahan-Numa".