The Masjid-i Jahān-Numā is popularly known as the Jama Masjid. This major mosque of Old-Delhi was built by the Mughal Emperor Shah Jahan, and is now acclaimed as the popular and the largest mosque in India. The mosque is also praised for housing an antique copy of the Qur'an, which is written on skin of deer. There are 389 steps at the northern gate, about 500 steps at the southern side, and around 774 steps at the eastern gate of the mosque. The mosque is constructed according to the Islamic style of architecture with three domes and two minarets, each of 41 m of height. The mosque has the capacity to accommodate about 25,000 people at one time.