Ghiyas ud-Din Tughluq, also known as Ghazi Malik was the founder and first ruler of the Muslim Tughluq dynasty (of Turkic origin) in India, who reigned over the Sultanate of Delhi (Sep, 08, 1320 – Feb, 1325). He has been the founder of the third city of Delhi called Tughluqabad.
The ‘Mausoleum of Ghiyas ud-Din Tughluq’ is connected by a causeway to the southern outpost of the fortification. This elevated causeway 600 ft in length, supported by 27 arches, leads across a former artificial lake, however sometime in 20th century portion of causeway was pierced by the Mehrauli-Badarpur road. After passing an old Pipal tree, the complex of Ghiyas ud-Din Tughluq’s tomb is entered by a high gateway made up of red sandstone with a flight of steps.
The actual mausoleum is made up of a single-domed square tomb (about 8 m x8 m) with sloping walls crowned by parapets. In contrast to the walls of the fortification made up of granite, the sides of the mausoleum are faced by smooth red sandstone and inlaid with inscribed panels and arch borders from marble. The edifice is topped by an elegant dome resting on an octagonal drum that is covered with white slabs of marble and slate.
Inside the mausoleum are three graves: The central one belongs to Ghiyas ud-Din Tughluq and the other two are believed to be those of his wife and his son and successor Muhammad bin Tughluq.