The Hassan II Mosque is a mosque located in Casablanca, Morocco. Designed by the French architect Michel Pinseau, it is the second largest in the world. It stands on a promontory looking out to the Atlantic, which can be seen through a gigantic glass floor with room for 25,000 worshipers. A further 80,000 can be accommodated in the mosque's courtyard. Its minaret is the world's tallest at 210 m.