mosque Mohamed Ali

It was built between 1828 and 1848. Perched on the summit of the citadel, this Ottoman mosque, the largest to be built in the first half of the 19th c., is, with its animated silhouette and twin minarets, the most visible mosque in Cairo.
It's outer courtyard is an ornate clock donated by the French, in exchange for the Obelisk that now stands in the Place de la Concorde, Paris. Unfortunately, the clock has never worked!