The Jama Masjid, being commissioned to be built by the Emperor Shah Jehan in the year 1650, the Jama Masjid was and is the principal mosque at Old Delhi. It also happens to be one of the oldest and most widely recognized mosques in the world, let alone in India. The Jama Masjid is one of the cultural extravagances that Shah Jahan gave as a legacy of his reign here along with that of the Red Fort and the Taj Mahal. Tourists are allowed to enter here except during prayer hours. There are three magnificent gates, two minarets constructed of strips of red sandstone and marble, and four towers that intensify its imposing structure.