Legend has it that anyone make a city in Delhi would eventually fall out of power, the last example being New Delhi by the English.
In the 1320 CE Ghiasuddin Tughlak known as a headstrong tyrant in history built the Tughlakabad city in the outskirts of the present day New Delhi.
He founded this city of Tughluqabad.
After Ghiyasuddin Tughlaq's death, succeeded Muhammad bin Tughluq, the infamous ruler who constantly moved the capital and its population between Delhi and Daulatabad.
Now Tughlakabad fortification is a sprawling ruins. The tomb is an ASI preserved monument.