The Jami Mosque is the principal mosque of Shahjahanabad, or 'Old Delhi,' the seventh Muslim city on the site of Delhi. The mosque, like the city, was founded by Shah Jahan, and its building was supervised by 'Allami Said Khan and Fazl Khan. It is one of the largest in India; its courtyard measures 91 meters across, and required six years of work by a reported 5,000 masons. It functions as a congregational, Friday (Jami) mosque, and has been an important commercial, and civic center for the…