The Cairo Citadel, also known as the Citadel of Saladin, is a historic fortress in Cairo, Egypt, built by Saladin in the 12th century. Over the years, it served as a seat of government and residence for rulers until the 19th century. Perched on a hill, it offers stunning views of the city. The Citadel underwent various modifications under different rulers, including Muhammad Ali Pasha in the 19th century. Today, it stands as a preserved site with mosques and museums, attracting visitors to explore its rich history and impressive architecture.