This mosque built by Feroz Shah Tughlaq in 1354 is among the few surviving inside the Citadel. This was the largest of the seven mosques built in Delhi during Tughlaq's reign. The main entrance to the mosque is to the north on account of it's proximity of the river to it's eastern wall. It rests on a series of cells in the ground floor. The cloisters on the sides to it's courtyard and it's prayer hall have disappeared with only a rear wall standing on the western side. According to contemporary historians there existed in centre of the quadrangle the sucken octagonal structure round which record of the reign of Feroz Shah, particularly of the public works executed by him was engraved. In the Mosque or in the adjoining building the Emperor Alamgir II was executed in 1781. The Mosque was visited by Sultan Timur towards the end of 1398 to say his prayers and he was so much impressed by the design of this building that he took masons and artisans alongwith him to Samarkhand whe he built a mosque on the same pattern.
