The Hassan II Mosque () is in Casablanca. It is the largest mosque in Morocco and the third largest mosque in the world after (i) the Masjid al-Haram (Grand Mosque) of Mecca and (ii) the Al-Masjid al-Nabawi (Prophet's Mosque) in Medina. It was designed by the French architect Michel Pinseau. It was built by Bouygues., it stands on a promontory looking out to the Atlantic, which can be seen through a really big glass floor with room for 25,000 worshippers. A further 80,000 can fit in the mosque's adjoining grounds. Its minaret is the world's tallest at .