to once have had as many as 52 gates of which only 13 remain today. The fortified city contained seven rainwater tanks. The fort is a half hexagon in shape with a base of , and a whole circuit of about . Tughluqabad is divided into three parts: the wider city area with houses built along a rectangular grid between its gates the citadel with a tower at its highest point known as Bijai-Mandal and the remains of several halls and a long underground passage the adjacent palace area containing the royal residences. A long underground passage below the tower still remains. Today most of the city is inaccessible due to dense thorny vegetation. An ever increasing part of the former city area is occupied by modern settlement, especially in the vicinity of its lakes. South of Tughlaqabad was a vast artificial water reservoir within the fortified outpost of Ghiyath al-Din Tughluq's Tomb. This well preserved mausoleum remains connected to the fort by an elevated causeway that still stands today. Visible to the southeast are the remains of the Fortress of Adilabad, built years later by Ghiyathu'd-Din's successor, Muhammad Tughluq (1325–1351) which shares the main characteristics of construction with Tughlaqabad fort. Gallery See also History of Delhi References Buildings and structures completed in 1321 Forts in Delhi Architecture of the Tughlaq dynasty Archaeological monuments in Delhi Monuments of National Importance in Delhi