A young child stands and plays with a paper plane in front of the Saladin Citadel (Al-Qal'a), a medieval Islamic fortification built in the 12th century by Saladin (Salah al-Din al-Ayyubi) on Muqattam Hill in Cairo. The citadel served as the seat of Egyptian government for nearly 700 years and remains one of Cairo's most prominent historical landmarks. Overcast clouds fill the sky above, creating a soft, diffused light over the stone fortress walls.