The Hassan II Mosque (Arabic: مسجد الحسن الثاني) is located in Casablanca (Morocco).

The Hassan II Mosque is the fourth largest mosque in the world and has a minaret with a height of 201 m, the highest in the world. Artisans recruited in all the cities of the kingdom had carved 53,000 m2 of wood and assembled more than 10 000 m2 of zellige (ceramics) for the place of worship.

A large sunroof allows according to the wish of King Hassan II to connect the building to the air, considered one of the four elements beneficial to life, with earth, fire and water.

Designed by architect Michel Pinseau, it was built by the French group Bouygues, project management is ensured by the Ministry of the Interior; at the time headed by Driss Basr