The Jama Masjid in Delhi, India is the largest and principal mosque. Commissioned by Emperor Shah Jahan and constructed between 1650-1656 CE, it utilized over 6000 workers and cost 1 million rupees. The red sandstone and marble mosque has three gates, four towers, and two 41 meter minarets. It has a 75m x 66m courtyard that can accommodate 25,000 worshippers and features a central tank. The complex architectural elements include arched colonnades, a golden dome, and inlaid marble tablets with Quranic verses.