Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Moti Masjid (Lahore Fort) - Moti Masjid (Punjabi Urdu: ) 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 Shah Jahan and is among his prominent extensions (such as Sheesh Mahal and Naulakha pavilion) to the Lahore Fort Complex. The mosque is located on the western side of Lahore Fort closer to Alamgiri Gate the main entrance.
A:
Building