Designed by Michel Pinseau, it is the second largest in the world (after the Masjid al-Haram in Mecca). It stands on a promontory looking out to the Atlantic, which can be seen through a gigantic glass floor with room for 25,000 worshippers. A further 80,000 can be accommodated in the mosque's courtyard. Its minaret is the world's tallest at 689 ft.