Moti Masjid, one of the "Pearl Mosques", is a 17th-century religious building located inside the Lahore Fort. It is a small, white marble structure built by Mughal emperor Jahangir, and is among his prominent extensions to the Lahore Fort Complex. The mosque is located on the western side of Lahore Fort, closer to Alamgiri Gate, the main entrance.EtymologyMoti in Urdu language means pearl, which designates a perceived preciousness to the religious structure. It was an established practice among Mughal emperors to name the mosques after generic names for gemstones. Other such examples are Mina Masjid (Gem Mosque) and Nagina Masjid (Jewel Mosque), both located in Agra Fort and completed in 1637 under Shah Jahan's reign. The mosque, built between 1630–35, is the first among the "pearl" named named mosques, the others built by Shah Jahan in Agra Fort (1647–53), and his son Aurangzeb in the Red Fort (1659–60).