Hassan II Mosque

Listen first. Behind the white marble of the plaza, the Atlantic is breaking against the rocks. The spray carries salt into the air, and on windy days you can feel it on your face. Above you, a green and cream tower climbs into the sky, and the light shifts across its tiles as clouds move in from the ocean. You are standing at the Hassan II Mosque, on the western edge of Casablanca, where the city simply stops and the sea begins.

This is a young building by the standards of Moroccan monuments. It was completed in 1993, after several years of construction. King Hassan the Second commissioned it, and it carries his name. The design came from a French architect, Michel Pinseau, who worked closely with the king. A French construction firm handled the engineering. But the hands that shaped the surfaces you see were Moroccan, and that detail matters more than any blueprint.

Here is the first surprise. Part of this mosque does not stand on the land at all. It was built on a platform reclaimed from the ocean, so a section of the complex sits over the water. The king reportedly drew on a line from the Quran that describes God's throne resting upon the water. Whether you read it as faith or as statement, the effect is clear — the faithful pray with the Atlantic beneath and around them.

Now look up at the minaret. It rises around two hundred metres, and for many years it was the tallest minaret in the world. A newer mosque in Algiers has since passed it. Still, nothing else in Casablanca comes close. At night, a beam of light shines from the top of the tower toward the east, pointing in the direction of Mecca. Ships far out at sea can use the tower as a landmark.

The tower follows a long Moroccan tradition. Its square shaft echoes the great minarets of the Almohad era, the medieval dynasty that built the Koutoubia in Marrakech and the Hassan Tower in Rabat. Square minarets are typical across North Africa and Andalusia, unlike the slender round towers of Istanbul. So this modern building looks back nearly nine hundred years for its outline, even as its steel and concrete belong to the late twentieth century.

Walk closer and the surfaces change. From a distance, the walls look plain. Up close, they are covered in zellige, the traditional Moroccan mosaic made from hand-cut pieces of glazed tile. Each tiny piece is chipped into shape by hand, then fitted into star patterns that repeat and interlock. Above the tile, you will often see carved plaster, so fine it looks like lace. Higher still, there is carved and painted cedar wood.

These three materials — tile, plaster and cedar — are the core vocabulary of Moroccan decoration. Thousands of craftsmen from across the country worked on this building. Many of them were masters of skills passed down through families in cities like Fez. In a way, the mosque became a living catalogue of Moroccan craft. If you are curious about how a single geometric star is built, stand close to a tiled panel and follow one line until it returns to where it started.

Here is the second surprise. The money for this enormous project did not come only from the state. Moroccans across the country were asked to contribute through a national public subscription. Many families gave, and some received certificates in return. Opinions about that campaign were mixed at the time. But it means that, for many Moroccans, this is not only the king's mosque. It is a building that ordinary households helped pay for.

Inside, the prayer hall is vast. It can hold around 25,000 worshippers, and the courtyard and plaza outside can take many tens of thousands more on the largest occasions. Look for the heavy chandeliers, the marble floors, and the cedar ceiling high above. Part of that roof is designed to slide open. On fine days, the hall can fill with daylight and fresh sea air, turning an interior space into something close to an open courtyard.

Most mosques in Morocco are closed to non-Muslim visitors. This one is a notable exception. Guided tours allow visitors of any faith to enter at set times, and they need a separate ticket bought on site. Modest dress is expected — shoulders and knees covered — and you will remove your shoes before you step onto the prayer hall floor. Tours pause during prayer times, so plan around the call to prayer.

Below the prayer hall, the tour usually descends into the ablution rooms. This is where worshippers wash before prayer, a ritual of cleansing that comes before every one of the five daily prayers. The fountains here are carved in marble, and their shapes are often compared to lotus flowers. There is also a hammam, a traditional bathhouse space. The quiet down here, and the sound of water in stone, feels very different from the wind above.

Back outside, take a moment on the plaza. Notice who is here. Families walk along the sea wall. Children chase pigeons across the marble. Students sit in the shade of the arcades with their phones. On Fridays, the space fills with worshippers. On other evenings, it works almost like a public park by the sea. This mix of the sacred and the everyday is part of how Casablanca uses this place.

Before you leave, turn and look back at the tower one more time. The tiles change colour as the sun moves — pale in the morning, warmer in the late afternoon, and lit from within after dark. Listen again for the ocean against the rocks. It was here before the mosque, and it shapes how the building feels. As you walk back toward the city, the minaret will stay in view for a long time, behind you, over the water.