The Hassan II Mosque is a mosque in Casablanca, Morocco. It is the largest mosque in the country and the 7th largest mosque in the world. Its minaret is the world's tallest at 210 m.
It stands on a promontory looking out to the Atlantic Ocean. A total of 105,000 worshippers can gather for prayer at the mosque simultaneously, 25,000 inside the mosque and another 80,000 on the mosque's ground outside.
The building was designed by the French architect Michel Pinseau and built by Bouygues.
Work on the mosque was commenced on 12 July 1986, 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 30 August 1993. During the most intense period of construction, 1400 men worked during the day and another 1100 during the night. 10,000 artists and craftsmen participated in building the mosque.
All of the granite, plaster, marble, wood and other materials used in the construction, were taken from around Morocco, with the exception of some Italian white granite columns and glass chandeliers. Six thousand traditional Moroccan artisans worked for five years to create the abundant and beautiful mosaics, stone and marble floors and columns, sculpted plaster moldings, and carved and painted wood ceilings.