On the Grid : Fatehpuri Masjid
"One of the 3 mosques built during Shahjahan's reign, this particular one is attributed to the largesse of his wife Fatehpuri Begum, and marks the West end of the Chandni Chowk axis. For a short while after the First War of Independence, the mosque was auctioned off and used as a warehouse by winning bidder Chunamal (whose haveli you can see nearby on Chandni Chowk). Legend has it that Chunamal washed his hands of the mosque in exchange for 3 villages in Mehrauli. Once here, do visit the phool mandi (flower market) that is housed in a room on the first floor." - Delhi Dallying
