Jama Masjid, India's largest mosque, was built by Mughal Emperor Shah Jahan between 1644-1656. It was constructed using more than 5,000 workers and cost 1 million rupees at that time. The mosque can hold 25,000 worshippers. Akbar built Fatehpur Sikri, Babur was the first Mughal emperor, and Humayun built Humayun's Tomb.