Rooftop-level view looking down into the vast open courtyard (sahn) of Ahmad ibn Tulun Mosque in Sayeda Zeinab, Cairo, with the central domed ablution fountain (Hawd) as the focal point surrounded by arcaded porticos on all sides. The image is captured in sepia tone, emphasizing the 9th-century Abbasid architectural style of the mosque, one of the oldest and largest surviving mosques in Egypt, built between 876–879 CE. In the background, the minarets and domes of the Cairo skyline, including the Mohamed Ali Citadel Mosque, are visible across the historic district.