The Hassan II Mosque or Grande Mosquée Hassan II (Arabic: مسجد الحسن الثاني‎‎; nickname: "Casablanca Hajj" (colloquial, microblogging and social networking language)[2] is a mosque in Casablanca, Morocco. It is the largest mosque in Morocco and the 13th largest in the world. Its minaret is the world's tallest at 210 metres (689 ft).[3][4] Completed in 1993, it was designed by Michel Pinseau and built by Bouygues. The minaret is 60 stories high topped by a laser, the light from which is directed towards Mecca.[5] The mosque stands on a promontory looking out to the Atlantic Ocean, worshippers can pray over the sea but there is no glass floor looking into the sea. The walls are of hand-crafted marble and the roof is retractable. A maximum of 105,000 worshippers can gather together for prayer: 25,000 inside the mosque hall and another 80,000 on the mosque's outside grounds.[4]