Hassan II Mosque is a prominent mosque located in Casablanca, Morocco, and is one of the largest mosques in the world. It was completed in 1993 and named after King Hassan II, who initiated its construction.

The mosque is situated on a promontory that juts out into the Atlantic Ocean, offering stunning views of the sea. The mosque's design is a blend of traditional Moroccan and Islamic architecture with modern techniques and materials, creating a unique and impressive structure.

The mosque can accommodate up to 105,000 worshippers, with an enormous hall measuring 200 meters long and 100 meters wide. The hall has a retractable roof, which can be opened to create an open-air space. The mosque's minaret is 210 meters tall, making it one of the tallest structures in the world.

The mosque's interior is adorned with intricate and elaborate decorations, including ornate plasterwork, carved and painted wood, and stunning mosaics. The prayer hall is particularly impressive, with a vast central chandelier made from glass and brass, which weighs 12 tons and is suspended from the ceiling.

The mosque is also notable for its extensive use of modern technology, including a laser system that projects a beam towards Mecca to indicate the direction of prayer, and a complex system of heating and air conditioning that ensures the interior is comfortable all year round.

The Hassan II Mosque is open to visitors of all faiths, with guided tours available throughout the year. It is an important landmark in Casablanca and a symbol of the city's rich cultural heritage.