A Turk governor, Ghiyasuddin Tughlaq invaded Delhi in 1320 and laid the muse of town of Tughlaqabad, whose ruins are nonetheless present. He developed the city of Siri in 1303. Hauzkhas has ruins of Siri Fort. Ghiyasuddin Tughlaq's successor, Muhammad bin Tughluq (1325-1351) raised the walls of the fort and developed a brand new city, which is known as Jahanpanah. There was a large part of this city, in which the palace, mosque and large chambers with many pillars and a number of other story po...