The Masjid-i Jahān-Numā (Persian: مسجد جھان نما, Devanagari: मस्जिद जहान नुमा, the 'World-reflecting Mosque'), commonly known as the Jama Masjid (Hindi: जामा मस्जिद, Urdu: جامع مسجد) of Delhi, is the principal mosque of Old Delhi in India. Commissioned by the Mughal Emperor Shah Jahan, it is the largest and best-known mosque in India. Construction began in 1650 and was completed in 1656.