[2][3][4][5][6] The crypt or the tomb is implanted in a Ghari (cave), approached by winding steep stairs made of stone, and supported by pillars and flooring.

The exterior of the tomb structure built in Delhi sandstone with marble adornment exhibits a walled area with bastions (towers) on corners, which impart it the look of a fortress in aesthetic Persian and Oriental architecture.

The resultant battle ended in signing of a treaty between Iwaz Khalji, the then ruler of Eastern India (Bihar and Bengal) and Iltumish; the former ruler agreeing to pay a surety of 80 lakh tankas (silver currency), 38 elephants, mint and issue of coins in the name of Iltumish and accepting Sultan's suzerainty over the region.

His two other sons, namely Ruknuddin Feroz Shah (died November 1236 AD, after he was deposed) and Muizzudin Bahram Shah (was killed in 1242 AD) who ruled for short periods, before and after their famous sister Razia Sultan ruled Delhi, were also buried in separate Chhatris (cenotaphs), just next to the Sultan Ghari.

[4][9][10] Some archaeological findings reported by the Archaeological Survey of India are a) the inscription of 1361 recording the excavation of a tank on the occasion of a marriage, b) a stone linga (Symbol of Lord Shiva the Hindu God in a lintel and c) a dilapidated mosque of Sultan Feroz Shah Tughlaq's time and a few scattered remnants of the Mughal period.

The octagonal shape of the tomb is also unique as it has been built within the fortress like outer structure with four corner towers, over a Ghari (cave) in front of the western Qibla wall of the mosque.

The Chhatri, a stand-alone structure, next to the Sultan Garhi, a tomb of one of the two sons of Iltumish, was also restored during Firuz Shah's reign.

Old ruins of a Tugluq mosque, Jami masjid and a khanqah (a place of spiritual retreat) are also located on the southern side of the tomb.

[1][12][13][14] The ceiling rests on columns raised with two pillars each robbed from an earlier Hindu shrine; carved lintels from another were found embedded in the thick lime-concrete roof.

[15] The heritage area of Sultan Ghari extends to 25 ha (61.8 acres), which has been zoned as per the topographical features to implement appropriate restoration and conservation actions.

[16] In order to restore this monument, which has been declared as a Grade A Monument by the Indian National Trust for Art and Cultural Heritage (INTACH), the Delhi Urban Heritage Foundation evolved a Plan combining restoration works along with creation of a pleasant environmental ambience to bring out its ancient glory.