Whether it’s the oldest mosque in Cairo or not (there is some debate about this), the Ibn Tulun Mosque is certainly the largest, and most definitely worthy of a visit while in Cairo. This huge, sprawling complex was built by Ahmad Ibn Tulun to accommodate all of his troops during Friday prayers. There’s an inscription slab on-site that identifies the date of the mosque’s completion as 879 AD.
The mosque covers an area of more than six acres and features small outer courtyards, their galleries decorated with intricately carved stucco. These courtyards served to ensure privacy, separating the sacred space of the interior from the outside world. The mosque’s minaret is the only one of its kind in Egypt and is a famous Cairo landmark. It features an external staircase on its second story, which spirals up to its pinnacle.