The document provides details about the Jama Masjid mosque in Delhi, India. It was commissioned by Mughal Emperor Shah Jahan between 1650-1656 and can hold up to 25,000 people. Key facts include: it is the largest mosque in India; located in Old Delhi; and construction involved 5,000 workers over 6 years at a cost of 1 million rupees. The mosque has several architectural features such as three entrance gates, a large courtyard, ablution tank, prayer hall, decorative domes and minarets over 40 meters tall.