Dating back to the middle ages, Cairo Citadel is an impressive fortress constructed by Salah ad-Din. Throughout history, the Citadel witnessed significant events in Egyptian history from its construction to the end of the Muhammad Ali Dynasty. Today, Cairo Citadel is a popular tourist destination. Visitors can explore the Citadel Complex, including Mohammed Ali Mosque, the Military Museum, the Police Museum, and Al Naser Ibn Qalawoon Mosque.