Possibly the largest Islamic mosque outside of Saudi Arabia is this giant structure built along the Atlantic Ocean in this African city with 5 million inhabitants. Which city?

The magnificent structure described is indeed the Hassan II Mosque, a jewel of Islamic architecture located in Casablanca, Morocco. This impressive landmark sits directly on the shores of the Atlantic Ocean, making it a prominent feature of the city's coastline. With its immense scale, it stands as one of the largest mosques globally and is often cited as the largest outside of Saudi Arabia, home to Islam's holiest sites.

Completed in 1993, the Hassan II Mosque is a truly monumental achievement. Its minaret soars to a breathtaking 210 meters (689 feet), making it the tallest in the world when it was built, and still among the very highest today. The mosque can accommodate 25,000 worshippers inside, with an additional 80,000 in its expansive courtyard. A unique engineering feat, a significant portion of the mosque's floor is made of glass, allowing visitors to glimpse the ocean directly beneath. It also features a retractable roof, opening to the sky on clear days.

This architectural marvel was commissioned by King Hassan II, symbolizing Morocco's ambition and its deep spiritual heritage. Beyond its religious function, the mosque represents Casablanca's status as a vibrant, modern African metropolis. As Morocco's economic capital and largest city, Casablanca is a bustling port with a population exceeding 5 million, aligning perfectly with the description of a major urban center. The Hassan II Mosque remains a powerful emblem of the city's identity and a testament to Moroccan craftsmanship.