The Citadel of Salah al-Din al-Ayyubi, commonly known as the Cairo Citadel or Citadel of the Mountain, is an iconic Islamic fortress occupying the Muqattam Hills since 1176 AD. Initiated by Saladin to protect Cairo like contemporary fortifications in Damascus and Aleppo, the citadel was completed during the reign of Sultan al-Kamel ibn al-Adel in 1207 AD and subsequently became the official residence of Egyptian rulers. Its strategic elevation provides panoramic views of the city and defensive advantages. Designated as a UNESCO World Heritage Site since 1976 as part of Historic Cairo, the citadel remains one of the Middle East's most impressive medieval defensive complexes.