Khirki Mosque - Credit: Wikimedia Commons
Khirki Mosque, approached from the Khirki Village in South Delhi and close to the Satpula or the seven arched bridge on the edge of southern wall of Jahanpanah (the fourth city of Medieval Delhi), was a mosque built by Khan-i-Jahan Junan Shah, the prime minister of Feroz Shah Tughlaq (1351–1388) of the Tughlaq Dynasty. The word 'Khirki' prefixed to mosque is an Urdu word that means "window" and hence is also called "The Mosque of Windows". Read more on Wikipedia
Source: en.wikipedia.org