The Badshahi Mosque (Emperor's or King’s Mosque) is the congregational mosque built by the Emperor Aurangzeb (Alamgir), grandson of Akbar, in 1673-4, to the south of Lahore Fort. It has one of the largest open courtyards of any mosque in the Islamic world (capable of accommodating over 55,000 worshipers).
The architecture and design of the Badshahi Mosque is closely related to the Jama Masjid in Delhi, India, which was built in 1648 by Aurangzeb's father and predecessor, Emperor Shah Jahan.