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English: Khirki Mosque the Khirki village in South Delhi and close to the Satpula or the seven arched bridge on the edge of southern wall of Jahapanah (the fourth city of Medieval Delhi), was a fort 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 fort is an Urdu word that means "window" and hence is also called "The Fort of Windows.Khan-i-Jahan Junaan Telangani and Feroz Shah Tughlaq were intensely committed towards building architectural monuments. Together, they planned and built several tombs, forts and mosques. Telangani in particular, was credited with building seven monuments of unique designs. The inference drawn for his interest to build monuments was that he was impelled by the fact that he was a Hinduconvert who willed to prove himself true to his converted Islamic religion. The regal fort built by him was the Khirki Fort. Constructed in the Jahapanah city, it is a novel cross–axial fort in Tughluqian architectural style built more like a fortress. There are no specific inscriptions on the Fort on its construction date, though the name of the builder is inscribed on the eastern gate of the Fort as 'Khan-e-Jahan Junaan Shah'. Recently, Delhi Circle started conservation of Khirkee mosque, where a hoard of 254 coins of medieval period found during clearance work on10th September. Study for deciphering of coins is being initiated.