The Hassan II Mosque is a mosque located in Casablanca, Morocco. It was designed by the French architect Michel Pinceau and is the second largest in the world (after the Masjid al-Haram in Mecca). It is sited 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 also the world's tallest at 210m.

Work on the mosque was commenced in 1980, and was intended to be completed for the 60th birthday of the former Moroccan king, Hassan II, in 1989. However, the building was not inaugurated until 1993.

It was built on a reclaimed embankment, inspired by the verse of the Koran that states 'the throne of God was built on the water'.

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