The Old Fort in New Delhi, constructed between 1533 and 1538 by the second Mughal emperor Nasir ud-din Muhammad Humayun in order to protect the city.

It is officially named Purana Qila and also has a mosque, seen in the picture on the right and known as the Qila Kuhna Masjid.

On the outside of the citadel's ramparts is a lake which is called the Old Fort Lake.